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Q: When a beam of light of wave lengths 4500 Å, 5400 Å, and 6000 Å respectively are passed through a prism then the angle of deviation is:
  • A. more in light of 4500 Å
  • B. more in light of 6000 Å
  • C. equal in all
  • D. more in light of 5400 Å
Correct Answer: Option A - When a beam of light of wave lengths 4500Å and 6000Å respectively passed through a prism then the angle of deviation is more in the light of 4500Å because the colour of light having longer wavelength deviates least when passing through the prism and the colour of light having shorter wave length deviates maximum when passing through the prism.
A. When a beam of light of wave lengths 4500Å and 6000Å respectively passed through a prism then the angle of deviation is more in the light of 4500Å because the colour of light having longer wavelength deviates least when passing through the prism and the colour of light having shorter wave length deviates maximum when passing through the prism.

Explanations:

When a beam of light of wave lengths 4500Å and 6000Å respectively passed through a prism then the angle of deviation is more in the light of 4500Å because the colour of light having longer wavelength deviates least when passing through the prism and the colour of light having shorter wave length deviates maximum when passing through the prism.