Question

The colour for which the critical angle is maximum in water air system is A.red B.violet C.yellow D. It is same for all colours

Answer 1

critical angle is directly propotional to wavelenth of light...the colour having longrst wavent will have highest value of critical angle

Answer 2

Answer:

Critical angle will be maximum in water air system for red colour.

Explanation:

• Total internal reflection is the total reflection of a beam of light from the surrounding surfaces back into a medium such as water or glass. It only happens if both of the following requirements are met.
• A light beam is moving through the more dense medium toward the less dense medium.
• The light ray's angle of incidence is larger than the critical angle.
• The critical angle is the angle of incidence with a refraction angle of 90°. When light enters in a denser medium from a less dense medium, its direction changes and the light beam bends towards the normal.
• In case of total internal reflection critical angle will directly proportional to the wavelength of the light.
• As, Red colour light is of the maximum wavelength.
• For red colour, the critical angle will be at its highest in the water air system.

Hence as red colour has the maximum wavelength and critical angle is directly proportional to wavelength of light, the maximum in water air system for red colour.

#SPJ2