Light - Study Mode
[#116] A spherical mirror and a thin spherical lens each have a focal length of -20 cm. Which of the following is likely to be true in such a scenario?
Correct Answer
(D) Both are concave
[#117] When the sun is near the horizon during the morning or evening, it appears reddish. The phenomenon that is responsible for this observation is
Correct Answer
(D) scattering of light
[#118] In case of reflection, it is well known that, when a mirror turned through an angle the reflected ray turns through
Correct Answer
(A) same angle
[#119] When light enters the denser medium through rarer medium, it is slow and . . . . . . . .
Correct Answer
(D) bends towards normal
[#120] The speed of light in vacuum is estimated to be . . . . . . . . m/s.
Correct Answer
(A) 3.00 × 10 8