Question

EXERCISES
A. Choose the most appropriate answer.
1. If medium A is optically denser than medium B, then the speed of light is
a. the same in both mediums.
b. higher in medium A than in medium B.
c. higher in medium B than in medium A.
d. higher in medium A or B depending on which medium is thicker.
2. When light travels from an optically denser medium to a rarer medium,
a. it bends away from the normal.
b. it bends towards the normal.
c. it is undeviated.
d. it is laterally displaced.
3. The splitting of white light into its constituent colours is called
a, refraction.
b. dispersion.
c. deviation
d. displacement
4. At what position of the object does a convex lens act as a magnifying glass?
a. between F and 2F
b. between F and o
c. bevond F
d. beyond 2F
5. Which of the following is true for a person suffering from myopia?
a. can see far-off objects clearly but near objects appear blurred
b. can be corrected using a convex lens
c. far point is at finite distance, and not at infinity
d near point is beyond 25 cm
6. If a person is suffering from hypermetropia, which object is he/she most likely to see blurred?
a. object 25 cm away
b. object 10 m away
c. object 100 m away
d. object at infinity
7. Which one of these controls the amount of light entering the eye?
a. pupil
b. iris
c. cornea
d. ciliary muscles
8. Myopia is corrected by using spectacles with
a. convex lenses. b. concave lenses. c. glass slabs.
d. prisms
9. When white light passes through a prism, it is
b. deviated but not dispersed.
a. deviated and dispersed.
d. reflected.
c. laterally displaced and not dispersed.
10. How many dots does the Braille system use?
c. 10
d. 11
a. 5
b. 6​

Answer 1

Answer:

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