Q156 / 160 · AP EAMCET 2020 (22 Sep Shift 2) · Physics

Conditions of diffraction is

  • A
    $\frac{a}{\lambda} \neq 1$
  • B
    $\frac{a}{\lambda}>>1$
  • C
    $\frac{a}{\lambda}< < 1$
  • Correct answer
    D
    $\frac{a}{\lambda} \leq 1$

Solution

For diffraction, the width $a$ of slit must be less than or comparable to wavelength of light used. i.e., $$ \frac{a}{\lambda} \leq 1 $$

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

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