# Question Bank on Light Essay Sample

10 October 2017

01. How do we see the things in visible radiation?
02. Write the different belongingss of visible radiation?
03. What are the different optical phenomena that takes topographic point due to illume?
04. Deflection of visible radiation?
05. State Torahs of contemplation of visible radiation?
06. What are the belongingss of the image formed by a plane mirror?
07. What are the two types of spherical mirrors?
08. What is a concave mirror and convex mirror?
09. Specify the followers of a spherical mirror?
a ) pole B ) Centre of curvature degree Celsius ) Principal focal point vitamin D ) Principal axis vitamin E ) Radius of curvature degree Fahrenheit ) aperture g ) focal length

10. What is the relationship between the radius of curvature and focal length?
10. A beam of light makes an L30° to the normal. Find out what angle does a reflected beam from a plane mirror will do with regard to the reflecting surface? 11. What is the angle of contemplation of an incident beam that travels along the normal to the reflecting surface? Why? 12.

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A beam of light makes an angle of 40° with regard to the rule axis of a concave mirror. Find out what will be the angle subtended by the reflected beam with regard to the rule axis? Why? 13. A beam going analogues to the rule axis hits a point M on the concave mirror. If the beam makes an angle of 30° to the line drawn from M to the Centre of curvature what will be the angle made by the reflected beam that passes through the rule focal point after contemplation with regard to the same line? Why? And how make you name the line? 14. If a paper is kept for a long clip at the rule focal point of a concave mirror exposed to the sunshine what will go on to the paper? Explain. 15. For spherical mirror of little aperture where does the rule focal point prevarication? 16. With a suited diagram write the of import regulations to be followed to pull the beam diagram for a concave mirror. 17. Complete the given beam diagram

18. Pull a beam diagram for a spherical mirror which forms a existent image of magnification less than one 19. Pull a beam diagram for a spherical mirror which forms a existent image of magnification more than one 20. Pull a beam diagram for a spherical mirror which forms a practical image of magnification less than one 21. Pull a beam diagram for a spherical mirror which forms a practical image of magnification more than one 22. Pull a beam diagram for the spherical mirrors for the object at eternity 23. How does the nature and place of the image alteration when the object recedes a concave mirror and convex mirror 24. Definition additive magnification

25. Write the mirror expression and expression to happen out additive magnification 26. Pull a beam diagram for a spherical mirror for m=1 for existent image 27. Write the new Cartesian convention regulations with a diagram. 28. A concave mirror forms a existent image at a distance of 25 centimeter for an object distance of 50 centimeter. Calculate the focal length of the mirror and its radius of curvature. Calculate the magnification produced by the mirror. 29. What are the utilizations of a concave mirror and a convex mirror? 30. Why can non a tooth doctor usage a convex mirror as his clinical mirror alternatively of a concave mirror? 31. Why can non a plane mirror be used as a rear position mirror? 32. Why can non a concave mirror be used as a rear position mirror? 33. The focal length of a concave mirror and a convex mirror is 25 centimeter. If an object is kept at a distance of 40cm from both of them calculate the image distance due to the mirrors separately and the magnification produced by both of them. 34. The magnification produced by a mirror is 4 for both type of images in two different instances. If the radius of curvature of the mirror is 40cm calculate the object distance and image distance for both the instances

35. The magnification produced by a mirror is 0. 25 for an image formed in the other side of the mirror. If the distance of the image from the mirror is 10cm calculate the radius of curvature of the mirror and besides place the mirror.

36. A dentist uses a mirror in forepart of a rotten tooth at a distance of 4cm from the tooth to acquire a 4 times exaggerated image on the mirror. Calculate the radius of curvature of the mirror. If he keeps the mirror in forepart of a taper at a distance of 80cm calculate what type of image does it organize and where does it organize? 37. A individual sitting in forepart of a barroom shaving mirror notices that the beams visible radiation from the Sun falls on a close by wall as a crisp and bright topographic point at a distance 2m from the mirror. At one case of clip he sits in forepart of the mirror at a distance of 1m and at another case he moves 1m off from his place. Calculate the image distances and magnification and type due to his places in forepart of the mirror. And pull a beam diagram for both of the places. 38. A stationary automobilist notices an nearing auto on his rear position mirror in two different case at a clip interval of 5 seconds. The magnification of the auto alterations from 0. 25cm to 0. 5cm in that clip. If the focal length of the mirror is 1m calculate the velocity of the auto.

39. There is a steering mirror in the hairpin crook of a narrow hilly route. At an case of clip two autos going towards the mirror notices each other on the mirror of radius of curvature 2m. If the distance of the image of auto A is formed at a distance of 50cm from the mirror and the other is 100cm from the mirror calculate the distances of the autos from the mirrors. If they travel with unvarying velocity which of the autos will make the crook rapidly. 40. If a concave mirror of focal length 10cm signifiers an image at a distance of 20cm calculate the distance of object from the mirror 41. If a convex mirror of radius of curvature 100cm has its object at distance 2m calculate the magnification produced by the mirror 42. How does the image place and size alteration if the object is moved off from a concave mirror and a convex mirror? 43. The magnification produced by a mirror for an image formed on the mirror alterations from 0. 4 to 0. 2. If the focal length of the mirror is 20cm calculate the distance through the object moved. 44. The magnification produced by a mirror for an image formed on the wall alterations from 0. 4 to 0. 2. if the focal length of the mirror is 40cm calculate the distance through the object moved. If the object has to bring forth a 5 times exaggerated image due to the motion of the object in the same way cipher the distance through which the object has to be moved and its distance from the mirror.

45. A mirror forms a 2cm image of a 4cm object in the same side of the mirror. If the radius of curvature of the mirror is 50 calculate the distance between the object and the mirror and the image and the mirror 46. A concave mirror of radius curvature 40cm produces 0. 5times exaggerated image of an object. If a convex mirror of same radius of curvature is replaced in that topographic point how does the magnification. place and type of the image alteration? 47. A mirror forms a 4cm tall image of a 2cm object in the same side of the object. If the distance between the rule focal point and the Centre of curvature of the mirror is 20cm calculate the nature. place of the image 48. A mirror forms a 6cm tall image of a 2cm object in the other side of the mirror. If the distance between the image and the mirror is 20cm calculate the focal length of the mirror 49. A mirror forms a 2cm tall image of a 6cm object in the other side of the mirror. If the distance between the image and the mirror is 10cm calculate the focal length of the mirror 50. What is the ground for the evident flattening of a lemon when it is kept in a tumbler of H2O? 51. Define refraction and the Torahs of refraction of visible radiation

52. Will at that place be a difference between the observation of the floor of the underside of the swimming pool when it is empty and when it is filled with H2O. 53. Will at that place be a alteration in the bending of a pencil kept in a glass of H2O when it is observed from outside to that of a glass of kerosine. Why? 54. Pull the beam diagram for the refraction through a glass slab and show that angle of incidence is equal to angle of refraction 55. Define sidelong supplanting and what are the factors on which the sidelong supplanting depends on? 56. A beam of light travels from medium A to medium B. The speed of visible radiation in A is twice of B. If its speed still increases in another medium C compare the angles of refraction of the beam visible radiation in medium B and C 57. A beam of light travels from medium A to B and farther to medium C. If the velocity of visible radiation in medium B is less than in medium C compared to that of A comparison the angle of refraction in B and C 58. A beam of light travels from medium A to B and has its angle of refraction greater than its angle of incidence. Find out in which medium its velocity is less. 59. A beam of light travels from medium from a crystalline substance A to another transparent substance B. If the angle of incidence is equal to angle of refraction what do you believe about the mediums and their refractile indices? 60. State Snells’ jurisprudence.

61. What do you intend by absolute refractile index?
62. How do you specify the term refractile index?

63. A beam of light travels from diamond of refractile index 2. 42 to H2O of refractile index 1. 33. Calculate the refractile index of H2O to diamond and diamond to H2O. In which of the medium the light travels with greater velocity? How does the beam of light crook in H2O? 64. There two braces of medium AB and AC. For the given angle of incidence the angle of refraction in the 2nd brace is less than the angle of incidence but in other instance the angle of refraction is greater. Of the both B and C which one is denser? 65. The absolute refractile index of medium A is 2. 4 and the absolute refractile index of medium B is 1. 2. A beam of visible radiation is incident is on A at an angle of 30° calculate the angle through which the beam gets refracted? 66. The absolute refractile index of kerosine is 1. 44. Calculate the speed of visible radiation in kerosine. 67. The velocity of visible radiation in H2O is 2. 5?108 m/s. If a beam of light travel from H2O to Ruby of refractile index 1. 7 calculate the speed of visible radiation in Ruby if the refractile index of H2O is 1. 3. 68. A beam of light travels with a velocity of 2?108 m/s in a medium Ten and if its velocity is halved in another medium Y calculate the refractile index of medium Ten to Y and Y to X

69. A beam of light travels with a velocity of 1. 5x108m/s in medium Ten and travels with a velocity of 2?108 m/s in another medium Y. If the absolute refractile index of medium Y is 1. 52 calculate the refractile index of other medium. 70. A ruddy beam of visible radiation is incident at angle of ten on a glass-air interface. If the ruddy visible radiation is replaced by a violet visible radiation will at that place be any alteration in the angle of refraction. Explain. 71. A beam of light makes angle outgrowth 45° at a glass- air interface. What is the angle of incidence for the beam of visible radiation at air-glass interface. 72. A beam of visible radiation is incident on the breadth side of a glass slab and on the length side of the same glass slab in another incidence. In which instance the sidelong displacement will be more.

Why 73. If a green beam of visible radiation is replaced by a bluish visible radiation for the given angle of incidence on the glass slab how does the sidelong displacement alteration? 74. ABCD is a square glass slab. If the beam of visible radiation is incident on AB side and CD side in two different sides in which of the incident the sidelong displacement will be more? 75. ABCD is a rectangular hollow glass slab. If the beam of visible radiation is incident at an angle of 45° what will be the angle of outgrowth. ( The slab is a thin walled slab ) 76. ABCD is a rectangular hollow glass slab. In an case it is filled with H2O and in another case it is filled with gum terpentine. For the given angle of incidence in which of the instances the sidelong displacement will be more. Why? 77. Are optical denseness and mass denseness same. If non warrant.

78. What is a lens. And what are the two outstanding types of lenses that we use in the lab. How will you place them physically and with its belongings? 79. A male child while playing with a convex lens looks at a printed paper through the lens in two different topographic points of the paper A and B. At A he notices that the letters of the printed affair appear bigger and at B the paper starts to fire. Which of the topographic points A or B is closer to the lens and why? 80. Specify the ocular Centre. focal length. rule axis. radius of curvature. power. rule focal point. aperture and Centre of curvature of a lens. 81. Write the new Cartesian mark convention regulations for a lens with a diagram. 82. Write the expression for a lens and the expression for magnification for a lens. 83. Why is the power of a convex lens is positive and concave lens is negative 84. Specify one diopter.

85. Write the regulations to be followed to pull the beam diagram for a lens with diagram 86. Pull the beam diagram for a lens which forms a practical exaggerated image. 87. Pull the beam diagram for a lens which forms a practical lessened image. 88. Pull the beam diagram for a lens which forms a existent image of magnification one 89. Pull the beam diagram for a lens which forms a existent diminished and existent hypertrophied image. 90. What happens to the image place and size when an object recedes from a convex lens and concave lens. 91. Complete the given beam diagrams.

88. Complete the given beam diagrams.
92. An object is kept at a distance of 30cm from a convex lens of focal length 15cm. Calculate the distance at which the image formed and its magnification. 93. An object is kept at distance of 40cm from a convex lens which forms an image at a distance of 20cm. Calculate the power and focal length of the lens. 94. The power of a convex lens is 10D. If it forms a existent image at a distance of 40cm from the lens calculate the topographic point where the object is placed. 95. An object is kept at a distance from lens of power 10D which forms a practical image at distance of 5cm from the lens. Calculate the distance at which the object is placed 96. An object is kept at a distance of a lens of power 10D which forms a practical image at a distance of 20cm from the lens. Calculate the distance at which the object is placed 97. A concave lens of focal length 30cm has its object at a distance of 60cm from it. Calculate its power. 98. A lens of power 5D signifiers an image in the same side of the object at a distance of 15cm from the lens.

If another lens of another type is kept in the same topographic point for the same object distance how does the image nature. place. distance and magnification of the object alteration due to the 2nd lens. 99. Two lenses A and B forms a 2cm tall image of an object of tallness 6cm in two cases. If A forms the image in the same side of the object and B in the other side of the lens calculate the power of the lenses for the given object distance of 20cm for the both. 100. A lens of focal length 20cm signifiers a magnification of 4 for the given object in two different cases A and B. Calculate the distance through which the object is moved in these two different cases. 101. A lens of power 10D signifiers an image of magnification 5 for an image in the same side of the object. If the object is moved 40cm off from the lens how does the image size. nature and place alteration? 102. The magnification due to a lens of focal length 20cm for a existent image alterations from 0. 2 to 2 Calculate the distance through which the object is moved.

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