Consider sunlight incident on a slit of width 10 ⁴Å. The image seen through the slit shall
(a) Be a fine sharp slit white in colour at the centre
(b) A bright slit white at the centre diffusing to zero intensities at the edges
(c) A bright slit white at the centre diffusing to regions of different colours
(d) Only be diffused slit white in colour.

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Vishal Baghel | Contributor-Level 10

7 months ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Answer- ( a)

Explanation- given width of slit is 10⁴10^-10m= 10^-6

Wavelength of sunlight varies from 4000A⁰ to 8000A⁰

As the width of slit is comparable to that of wavelength, hence diffraction occurs with maxima at centre. So, at the ce

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= 800mm

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Physics Ncert Solutions Class 12th 2023

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