Consider sunlight incident on a pinhole of width 10³A⁰ .The image of the pinhole seen on a screen shall be :
a) A sharp white ring
b) Different from a geometrical image
c) A diffused central spot, white in colour
d) Diffused coloured region around a sharp central white spot

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

Only “b” and “c” are true

Only “c” and “d” are true

Only “b” and “d” are true

Only “a” is true

answer is B.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

The width of pinhole 10 =1000 $A^{0}$
and wavelength of visible light is 4000 $A^{o}$ to 8000 $A^{o}$ . i.e. size of slit is less than (or comparable) with the wavelength of light.So light from pinhole will diffract from the hole. Due to diffraction from the slit the image formed on the screen will be different from the geometrical image.

Watch 3-min video & get full concept clarity