Light - Study Mode
[#466] Assertion (A): Small glass beads fixed on traffic signals glow brightly when light falls upon them. Reason (R): Light is totally reflected when the angle of incidence exceeds a certain critical value and light travelling in a denser medium is reflected from a rarer medium.
Correct Answer
(A) Both (A) and (R) are true and (R) is the correct explanation of (A)
[#467] A colour blind person cannot
Correct Answer
(C) distinguish between certain colours
[#468] In long-sightedness, images are formed
Correct Answer
(C) behind the retina
[#469] Optical fiber works on the principal of?
Correct Answer
(B) total internal reflection
[#470] Sea seems blue due to
Correct Answer
(B) Reflection of sky and scattering of light by the drops of water