Question

The phenomenon due to which white light splits into seven colours on passing through a prism is called _________

• A. reflection
• B. refraction
• C. dispersion
• D. all the above

Answer 1

Answer: (C)

dispersion

The phenomenon due to which white light splits into seven colours on passing through a prism is called dispersion. White light is made up of seven bands of colors each having different wavelengths. Upon passing through a medium, each of the colors travels at different speeds and hence has different angles of refraction leading to the splitting of the light i.e. dispersion.