Question

Choose the correct statement:
The angle of deviation for Indigo is greater than the angle of deviation of the orange colour.
The angle of deviation increases with increase in the wave length of the incident light.

• A. Only A is true
• B. Only B is true
• C. Both A and B are true
• D. Both A and B are false

Answer 1

The correct option is C Both A and B are true

The angle of deviation of a light ray while refraction is directly proportional to the wavelength of the light. In a VIBGYOR ; wavelength increases from violet to red hence angle of deviation also increases in same way. hence orange has greater angle of deviation than indigo.