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JEE Main 20209 JanuaryEvening Shift
Exam
JEE Main
Year
2020
Date
9 January
Shift
Evening Shift
Subject
Physics
Chapter
Wave Optics

JEE Main 2020 · 9 January · Evening Shift · Physics · Wave Optics

In a Young's double slit experiment 15 fringes are observed on a...

In a Young's double slit experiment 1515 fringes are observed on a small portion of the screen when light of wavelength 500nm500nm is used. Ten fringes are observed on the same section of the screen when another light source of wavelength λ\lambda is used. Then the value of λ\lambda is (in nmnm ) __________.

Correct answer

0

Step-by-step solution

15×500×Dd=10×λ2×Dd15 \times 500 \times \dfrac{D}{d} = 10 \times {\lambda}_{2} \times \dfrac{D}{d}
λ2=15×50nm{\lambda}_{2} = 15 \times 50nm
λ2=750nm{\lambda}_{2} = 750nm
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