Question

What happens to critical angle of a material when its temperature increases?

• A. Critical angle of a material increases with temperature as its refractive index increases
• B. Critical angle of a material decreases with temperature as its refractive index increases
• C. Critical angle of a material increases with temperature as its refractive index decreases
• D. Critical angle of a material decreases with temperature as its refractive index decreases
• E. Critical angle of a material is independent of Temperature

Answer 1

The correct option is C

Critical angle of a material increases with temperature as its refractive index decreases