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 | SaraNextGen Answer

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