True/FalseEasy1 mark
5(ii)
Light travels a distance of ‘10x’ units in time ‘t1’ in vacuum and it travels a distance of ‘x’ units in time ‘t2’ in a denser medium. Using this information answer the question that follows :
‘Light covers a distance of ‘20x’ units in time ‘t1’ in diamond.’ State true or false.
Topic: Speed of light in a medium
Question wording verified against source paper
Answer
Exam answer
False.
Explanation
Diamond is optically denser than vacuum, so light travels a smaller distance in the same time.
More from Refraction of Light at Plane Surfaces
From the figure given below, the refractive index of medium B with respect to medium A (ₐμᵦ) is:
(a) sin 45° / sin 30°
(b) sin 30° / sin 45°
(c) sin 45° / sin 60°
(d) sin 60° / sin 45°2026When a ray of light passes from a denser to a rarer medium, its wavelength ............... [decreases / increases].2026the angle of incidence is maximum.2026the angle of incidence is minimum.2026the angle of incidence is equal to the angle of emergence.2026What is the product of the ratio
sin i / sin r
at the first surface and at the second surface?2026