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Intensity Amplitude Relationship

Find the half...

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Find the half angular width of the central bright maximum in the Fraunhofer diffraction pattern of a slit of width12 10- cm when the slit is illuminated by monochromatic light of wavelength 6000 A.

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Q. Find the half angular width (in degrees) of the central bright maximum in the Fraunhofer diffraction pattern of a slit of width

12 \times 10^{- 5} cm

when the slit is illuminated by monochromatic light of wavelength

6000 ˚ A

Q. The angular width of central maxima in the Fraunhofer diffraction pattern is measured. The slit is illuminated by the light of wavelength

6000 ˚ A

If the slit is illuminated by a light of another wavelength, angular width decreases by 30%. The wavelength of light used is :

Q. The angular width of the central maximum in the Fraunhofer diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength

6000 ˙ A

. When the slit is illuminated by light of another wavelength

(λ)

, the angular width decreases by

30 %

. Calculate the wavelength

(λ)

of this light in

˙ A

. The same decrease in the angular-width of central maximum is obtained when the original apparatus is immersed in a liquid. Find the refractive index

μ

Q. Angular width of central maximum in the Fraunhoffer diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength

6000 ˚ A

. When the slit is illuminated by light of another wavelength, then the angular width decreases by

30

%. The same decrease in angular width of central maximum is obtained when the original apparatus is immersed in a liquid. The refractive index of the liquid will be

Q. The angular width

Δ θ

of the central maximum in the diffraction pattern of a slit illuminated by light of wavelength

500 nm

is measured. The angular width of the central maximum is found to increase by

25 %

, when the same slit is illuminated by another light of wavelength

λ^{'}

. Then wavelength

λ^{'}

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