Question

In the phenomenon of refraction of light for the same angle of incidence

• A. angle of refraction is same for different colours.
• B. angle of refraction is different for different colours.
• C. angle of refraction does not depend upon the colour of the light used.
• D. angle of refraction depends on critical angle.

Hint:

The refractive index depends on wavelength, so different colours refract by different amounts.

Answer 1

The Correct Option is B

Step 1: Snell law
$r = \sin^{-1}(\sin i / n)$.

Step 2: Dispersion
$n$ differs for each wavelength, so $r$ differs.

Step 3: Answer
Option (B).

Final Answer:
Option (B). \[ \boxed{\text{Different for different colours}} \]