A parallel beam of light of wave length `6xx10^(-7)`m falls normally on a straight slit of width 0.2 mm. Find the totalk angular width of the central diffraction maximum and also its linear width as observed on a screen placed 2 m away.
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In a routine Young’s double slit experiment the paral- lel beam of light incident on the slit plane is a mixture of wavelength distributed between` la
Correct Answer - `Deltalambdalt(lambda)/(3)`
2 Answers 1 views
A parallel beam of monochromatic light of frequency v is incident on a surface. Intensity of the beam is I and area of the surface is A. Find the forc
Correct Answer - (i) `(IA)/(c)` , (ii) `(2IA)/(c)` (iii) `(Iacostheta)/(c)` , (iv) `(2IAcos^(2)theta)/(c)`
2 Answers 1 views
A parallel beam of light falls normally on the first face of a prism of small refracting angle. At the second refracting face it is partly reflected a
Correct Answer - `mu = 2, A = 1^(@)`
2 Answers 1 views
Microwaves of frequency 24,000 MHz are incident normally on a rectengular on a rectangular slit of width 5 cm. Calculate the angular spread of the cen
Correct Answer - `pm`1/4 rad
2 Answers 22 views
The light of wavelength 600 nm is incident normally on a slit of width 3 mm. Calculate the linear width of central maximum on a screen kept m awy from
Correct Answer - 1.2 mm
2 Answers 1 views
a 0.02 m wide slit is illumijnated at normal incidence by light of wavelength 6000 Å (i) Find the width of the central maximum band on the screen plac
Correct Answer - (i)0.6 cm (ii) 0.45 cm
2 Answers 2 views
A parralel beam of monochromatic light of wavelength 5000 Å is incident normally in a narrow slit of width 0.25 mm. The diffraction pattern is observe
Correct Answer - `6xx10^(-3)rad`
2 Answers 1 views
A laser beam has a wavelength of `6xx10^(-7)`m and aperture of `6xx10^(-2)`m. The beam is sent towards the moon which is at a distance of `4xx10^(8)`m
Correct Answer - (i)`1.22xx10^(-5)rad(ii) 2.381xx10^(7)`m
2 Answers 1 views
A beam of light travelling in water falls on a glass plate immersed in water. When the incident angle is `51^(@)`, the reflected beam of light is foun
Correct Answer - 1.647
2 Answers 1 views
The distance between a slit and a biprism of acute angle `2^(@)` is 10cm. Find the fringe width and the width of the entire band when observation is m
Correct Answer - `[0.168 mm, 31.5 mm]
2 Answers 1 views