SaraNextGen Study App [2023-24]
Last Updated On 01-06-2023 - By Jeesha Sara

A single slit is located effectively at infinity in front of a lens of focal length 1 m and it is illuminated normally with light of wavelength 600 nm.  The first minima on either side of central maximum are separated by 4 mm.  Width of the slit is ……

a)

0.1 mm

b)

0.2 mm

c)

0.3 mm

d)

0.4 mm


Question ID - 150024 :-

A single slit is located effectively at infinity in front of a lens of focal length 1 m and it is illuminated normally with light of wavelength 600 nm.  The first minima on either side of central maximum are separated by 4 mm.  Width of the slit is ……

a)

0.1 mm

b)

0.2 mm

c)

0.3 mm

d)

0.4 mm

1 Answer
5876 Votes
3537

Answer Key : (c) -

(c)

 separation between minima on either side of central maximum’

Hence,



Next Question :

In the set up shown in Fig the two slits,  and  are not equidistant from the slit . The central fringe at  is then

a)

Always bright

b)

Always dark

c)

Either dark or bright depending on the position of

d)

Neither dark nor bright


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