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Inclined Planes

21. In an int...

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21. In an interference pattern the position of zeroth order maxima is 4.8 mm from a certain point on a screen. The frige width is .2 mm the position of 2nd order minima grom point p is?

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Q. In a double slit pattern

(λ = 6000 A^{\circ})

, the first order and tenth order maxima fall at

13.00 mm

15.25 mm

from a particular reference point. If

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5500 A^{\circ}

, find the position of tenth order fringe (in mm) (answer the nearest integer), other arrangement remaining the same.

Q. A beam of light wavelength

400 n m

falls on a narrow slit and the resulting diffraction pattern is observed on a screen

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2^{n d}

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Q. In a Young's double slit experiment, the distance between the slits & the screen is

100 cm .

For a certain distance between the slits, an interference pattern is observed on the screen with the fringe width

0.25 mm

. When the distance between the slits is increased by

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2 / 3

of the original value. In the final position, a thin glass plate of refractive index

1.5

is kept in front of one of the slits & the shift of central maximum is observed to be

20

times the initial fringe width. Find the thickness of the plate.

Y D S E

experiment, the distance between the slits & the screen is

100 cm

. For a certain distance between the slits, an interference pattern is observed on the screen with the fringe width

0.25 mm

. When the distance between the slits is increased by

Δ d = 1.2 mm

, the fringe width decreased to

n = 2 / 3

of the original value. In the final position, a thin glass plate of refractive index

1.5

is kept in front of one of the slits & the shift of central maximum is observed to be

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fringe width. Which of the options are correct ?

Q. In Lloyd's mirror experiment, a light wave emitted directly by the source

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M

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l = 100 cm

. At a certain position of the source, the fringe width on the screen was equal to

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and after the source was moved away from the mirror plane by

Δ h = 0.60 mm

the fringe width decreased by

1.5 times

. Find the wavelength of light from the source.

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