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 observed on a screen placed at a focal lens of a convex lens placed closed to the slit between slit and screen. Find the angular seperatiion between the first secondary maxima on either side of the central maximum.
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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
When light of wavelength 400nm is incident on the cathode of photocell, the stopping potential recorded is 6V. If the wavelength of the incident light
Correct Answer - 4.97 V
2 Answers 7 views
A narrow slit , illuminated by a monochromatic source of wavelength `5896 xx 10^(-10)` m is placed at a distance of 5 cm from a biprism . The virtual
Correct Answer - `5896 xx 10^(-7)` m
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 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
Correct Answer - `6xx10^(-3)rad`,1.2 cm
2 Answers 1 views
Sodium light of wavelength 5890 Å is incident normally on a diffraction grating of 5000 rulings per cm. Find the angle of diffraction for the second o
Correct Answer - `36.1^(@)`
2 Answers 2 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
Suppose a monochromatic X-ray beam of wavelength 100 pm is sent through a Young's double slit and the interference pattern is observed on a photograph
Correct Answer - `4 xx 10^(-7) m`
2 Answers 1 views