A person can focus an object only when it lies within 200cm from him. Which spectacles should be used to increase his maximum distance of distinct vision infinity?
A. Convex lens B. Binoculars C. Concave lens D. Plane glasses Correct Answer: Option C – Concave lens Explanation A person with this condition is said to be short-sighted. Hence, to correct it, a concave lens is used for...
A ray of light makes an angle of 35° with a plane mirror. What is the angle of reflection?
A. 35° B. 55° C. 70° D. 65° Correct Answer: Option B = 55° Explanation 35° =35° = 70° 180 – 70 = 110 110/2 = 55°
What happens to the rays in a parallel beam of light?
A. They diverge as they travel B. they intersect C. They converge as they travel D. They meet at infinity. Correct Answer: Option D – They meet at infinity.
What types of mirror are capable of producing parallel beams of light such as those arising from the headlamps of a car?
A. Parabolic mirrors B. Plane mirrors C. Cylindrical mirrors D. Spherical mirrors Correct Answer: Option A – Parabolic mirrorsProducts
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