Consider sunlight incident on a pinhole ...

Consider sunlight incident on a pinhole of width `10^(3)Å`. The image of the pinhole seen on a screen shall be

a sharp white ring

different from a geometrical image

a diffused central spot, white in colour

diffused coloured region around a sharp central white spot

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The correct Answer is:

B, D

(b,d) Given, width of pinhole `=10^(3)Å=1000Å`
We know that wavelength of sunlight ranges from `4000Å " to " 8000Å`
Clearly, wavelength ` lambda lt ` width of the slit.
Hence, light is diffracted from the hole. Due to diffraction from the slight the image formed on the screen will be different from the geometrical image.

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