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 the slit.
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White light is incident normally on a glass plate (in air) of thickness `500 nm` and refractive index of `1.5`. The wavelength (in `nm`) in the visibl
Correct Answer - B For strong reflection. `2mut=(lambda)/(2),(3lambda)/(2),(5lambda)/(2).....rArr lambda=4mut,(4mut)/(3),(4mut)/(5),(4mut)/(7).....` `rArr 3000 nm. 1000 nm, 600 nm, 333 nm.` `rArr` only option is `600 nm`.
2 Answers 1 views
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
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
White light is incident normally on a plane parallel thin film of µ=1.5. Find the minimum thickness of the film for which light of `lamda`=4000 Å is a
Correct Answer - `1.33xx10^(-7)`m
2 Answers 2 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
A screen is placed 2 m away from a single narrow slit which is illuminated by the light of wavelength `6xx10^(-7)`m. If the first minimum lies 4 mm on
Correct Answer - 0.03 cm
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 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
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
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