Consider sunlight incident on a slit of width `10^(4) Å` . The image seen through the slit shall

Options

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

A

Explanation

Visible range , `lambda=3900 Ã…` to `7000 Ã…`
Given width of the slit, `a=10^(4) Ã…=10000 Ã…`
Thus `a gt lambda,` Hence, no diffraction occurs.
The image seen through the slit shall be a fine sharp slit white in colour at the centre.