Question

Consider sunlight incident on a slit of width 104 A. 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 a diffused slit white in colour.​

Answer 1

Answer:

The wavelength of the visible light lies in the range 4000 A°

−7000 A°

whereas the width of the slit is about 104 A°.

Since the width of the slit is comparable to that of wavelength. Diffraction occurs with maxima at centre. The maxima consist of all the colour of lights present in the wave. Therefore, At the centre all colours appear that is mixing of colours from the white patch at the centre

Explanation:

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