Q148 / 270 · NDA 2023 (Phase 1) · General Ability

In the dispersion of white light by a common glass prism, which one among the following is correct?

  • A
    Red light deviates the most because red light has highest speed in prism
  • B
    Blue light deviates the most because blue light has highest speed in prism
  • C
    Red light deviates the most because red light has lowest speed in prism
  • Correct answer
    D
    Blue light deviates the most because blue light has lowest speed in prism

Solution

In the dispersion of white light by a prism, blue light deviates the most because light has lowest speed and least wavelength in prism.

Hence, the correct answer is option: 'D'.

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