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question_answer1) When a light ray is incident normally on the surface of a plane mirror, the reflected ray deviates through an angle of _______.
question_answer2) What is the sum of angle of incidence, angle of reflection and angle of deviation equals to?
question_answer3) If the angle of deviation after reflection of a light ray is d, then find (a) Angle of incidence (b) Angle of reflection (c) Angle of glancing
question_answer4) Keeping the incident ray constant, if a plane mirror is rotated through an angle \[\theta \], about an axis lying in its plane, then the reflected ray turns through an angle ________.
question_answer5) The angle between an incident ray and reflected ray for a given reflection is x. If the mirror is rotated through an angle x/2, keeping the incident ray constant, then find the angle between incident ray and reflected ray after rotation. Consider both clock wise and anticlock wise direction.
question_answer6) Keeping the plane mirror fixed, if the incident ray is rotated through an angle \[\theta \], then the angle through which the reflected ray rotates is ______.
question_answer7) A plane mirror lies face up, making an angle \[{{15}^{o}}\] with the horizontal. A ray of light shines down vertically on the mirror. What is the angle of incidence? What will be the angle between the reflected ray and the horizontal be?
question_answer8) If the reflected beam is convergent, ______ type of image is formed and if the reflected beam is divergent, then ______ type of image is formed.
question_answer9) A light bulb is placed between two mirrors inclined at an angle of \[{{60}^{o}}\]. The number of images formed are ____.
question_answer10) Two plane mirrors are kept at an angle of \[{{35}^{o}}\] to each other. A ray of light is incident on one of them at an angle of \[{{27}^{o}}\]. The angle of deviation is ____.
question_answer11) (i) A person approaches a plane mirror with a velocity Y. He approaches his image with a velocity of ____. (ii) The distance between object and image formed by a plane mirror is 60 cm. If the object is moved away from the plane mirror by 15 cm, then the distance between object and image is ___.
question_answer12) Can a ray move from one medium to another medium, without bending. If so explain.
question_answer13) What is speed of light in diamond of refractive index 2.4, if the velocity of light in air is\[3\times {{10}^{8}}m/s\]?
question_answer14) An object 2.5 m high is placed in front of a pin hole camera. If the width of camera is 24 cm and size of image formed is 1.2 cm, find the distance of the object from pin hole camera.
question_answer15) The magnification of an image formed by a pin hole camera is 0.0005. If the object is at a distance of 500 m, calculate the distance of image from the pinhole.
question_answer16) In the above case, if the size of image is 2.4 cm, calculate the height of the object. m = 0.0005 Size of the image, I = 2.4 Size of the object, O = ?
question_answer17) A ray of light is moving from air into medium. If the angle of incidence in air is \[{{45}^{o}}\] and angle of refraction is \[{{30}^{o}}\], then find the angle of deviation.
question_answer18) A ray of light is moving from air into medium. If the angle of incidence in air is \[{{45}^{o}}\] and angle of refraction is \[{{30}^{o}}\], then find the refractive index of the medium.
question_answer19) What is meant by power of accommodation of the eye?
question_answer20) A person with a myopic eye cannot see objects beyond 1.2 m distinctly. What should be the type of the corrective lens used to restore proper vision?
question_answer21) What is the far point and near point of the human eye with normal vision?
question_answer22) A student has difficulty reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be corrected?
question_answer23) The human eye forms the image of an object at its (a) cornea (b) iris (b) pupil (d) retina
question_answer24) Why is a normal eye not able to see clearly the objects placed closer than 25 cm?
question_answer25) What happens to the image distance in the eye when we increase the distance of an object from the eye?
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