Light - Study Mode
[#121] The ratio of the speed of light in a medium to a vacuum is called . . . . . . . . .
Correct Answer
(B) Refractive index
[#122] When a person walking in bright sunlight enters a dark room, he is not able to see clearly for a little while because the
Correct Answer
(D) iris is unable to dilate the pupil immediately
[#123] Which one of the colours has the longest wavelength?
Correct Answer
(D) Red
[#124] The speed of light with the rise in the temperature of the medium
Correct Answer
(C) remains unaltered
[#125] An air bubble in water will act like a
Correct Answer
(D) Concave lens