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Diffraction through Circular Slits

Read the stat...

Question

Read the statements A and B and mark the correct option.
Statement A: In Fresnel diffraction phenomenon, the source or screen or both are at finite distances from the aperture.
Statement B: In Fraunhoffer diffraction, lenses are used to modify the incoming light.

A

Both A and B are correct

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B

A is correct and B is wrong

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C

A is wrong and B is correct

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D

Both A and B are wrong

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Solution

The correct option is A Both A and B are correct
Both A and B are correct

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Similar questions

Q. A: Fresnel diffraction occurs when the source of light or the screen or both are at a finite distance from the diffracting device
B: Diffracted light can be used to estimate the helical structure of nuclic acids

Q. A light of wavelength

λ

is incident on an object of size b. If a screen is at a distance D from the object. Identify the correct condition for the observation of different phenomenon :
a) if

b^{2} = D λ

, Fresnel diffraction is observed
b) if

b^{2} >> D λ

, Fraunhoffer diffraction is observed
c) if

b^{2} << D λ

, Fraunhoffer diffraction is observed
d) if

b^{2} = D λ

, Fraunhoffer diffraction is observed

Q. (a) Describe briefly how a diffraction pattern is obtained on a screen due to a single narrow slit illuminated by a monochromatic source of light. Hence obtain the conditions for the angular width of secondary maxima and secondary minima.

(b) Two wavelengths of sodium light of 590 nm and 596 nm are used in turn to study the diffraction taking place at a single slit of aperture

2 \times 10^{- 6} m

. The distance between the slit and the screen is 1.5 m. Calculate the separation between the positions of first maxima of the diffraction pattern obtained in the two cases.

Q. In Fraunhoffer diffraction experiment, L is the distance between screen and the obstacle, b is the size of obstacle and

λ

is wavelength of incident light. The general condition for the applicability of Fraunhoffer diffraction is:

Q. (a) In what way is different from each slit related to the interference pattern in a double slit experiment
(b) Two wavelength of sodium light 590 nm and 596 nm are used in turn to study the diffraction taking place at a single slit of aperture

2 \times 10^{- 4} m

, The distance between the slit and the screen is 1.5m, Calculate the separation between the positions of the first maxima of the diffraction pattern obtained in the two cases.

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Diffraction through Circular Slits

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