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Question

Two slits are made one millimetre apart with screen placed one metre away and blue-green light of wavelength 500nm is used. What should width of each slit be to obtain 10maxima of double slit pat-tern within central maximum of single slit pattern?

A
0.1mm
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B
0.05mm
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C
0.2mm
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D
0.4mm
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Solution

The correct option is C 0.2mm
Given,

2λDb=10λDd

b=d5

=15=0.2mm


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