question_answer1) Choose the correct statements: (a) Regular reflection takes place on highly polished smooth surfaces (b) Irregular reflection takes place on rough surface (c) Irregular reflection is also called as diffused reflection. (d) On plane mirror regular reflection takes place.View Answer play_arrow
question_answer3) In a school ground, a baby of monkey is running towards the plane mirror fixed to the wall, with a speed of 25 m/s, it observes that its image is moving towards it with a speed of ____ m/s.View Answer play_arrow
question_answer6) Choose the correct statements (a) Convex mirror acts as converging mirror. (b) Image formed by convex mirror is virtual (c) For a concave mirror when object is placed at infinity the image is formed at principal focus. (d) Convex mirror acts as diverging mirror.View Answer play_arrow
question_answer8) If a convergent beam of light passes through a diverging lens, then the result (a) May be a convergent beam (b) May be a divergent beam (c) May be a parallel beam (d) Must be a parallel beamView Answer play_arrow
question_answer9) Which of the following is/are correct (a) Convex lens is used in making search lights and spot lights in theatres (b) Convex lens is used as a magnifying glass (or) simple microscope (c) Convex lens is used in terrestrial telescope for erecting the inverted image formed by the objective lens of the telescope (d) Concave lens is used in spectacles for the correction of hyper metropiaView Answer play_arrow
question_answer11) A converging lens is used to form an image M on a screen, when the upper half of the lens is covered by an opaque screen (a) Half of the image will disappear (b) Complete image will be formed (c) Intensity of image will increase (d) Intensity of the image will decreaseView Answer play_arrow
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