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  • In Young's double slit experiment, separation between the slits is <img alt="2 \times 10^{-3} \mathrm{~m}" src="https://entrancecorner.oncodecogs.com/gif.latex?2%20%5Ctimes%2010%5E%7B-3%7D%20%5

In Young's double slit experiment, separation between the slits is 2 \times 10^{-3} \mathrm{~m} and distance of the screen from the slit is 2.5 \mathrm{~m}.Light in the range of 2000-8000 \AA  is allowed o fall on the slits. Wavelength in the visible region that will be present on the screen at 10^{-3} \mathrm{~m} from the central maxima will be

Option: 1

4000 \AA


Option: 2

5000 \AA


Option: 3

6000 \AA


Option: 4

8000 \AA


Answers (1)

best_answer

\delta=\frac{\mathrm{xd}}{\mathrm{D}}=\frac{10^{-3} \times 2 \times 10^{-3}}{2.5}=8000 \AA

For bright line 8000=n_{1} \lambda_{1}=n_{2} \lambda_{2}=n_{3} \lambda_{2}

\text { If } \mathrm{n}_{1}=2 \Rightarrow \lambda_{1}=4000 \AA

i.e., second bright line for visible region is present.

 

Posted by

Rishabh

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