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JEE Main20209 Jan 2020Evening ShiftPhysicsWave OpticsActual

In a Young's double slit experiment 15 fringes are observed on a small portion of the screen when light of wavelength 500 n m is used. Ten fringes are observed on the same section of the screen when another light source of wavelength λ is used. Then the value of λ is (in n m ) __________.

Correct answer

0

Step-by-step solution

15 × 500 × D d = 10 × λ 2 × D d λ 2 = 15 × 50   n m λ 2 = 750   n m

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