EASY
JEE Advanced
IMPORTANT
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The direction of the first secondary maximum in the Fraunhofer diffraction pattern at a single slit is given by (a is the width of the slit):

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Important Questions on Interference and Diffraction of Light

EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 53
A light wave is incident normally over a single slit of width 24×10-5 cm. The angular position of second dark fringe from the central maxima is 30°. What is the wavelength of light?
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 54
A parallel beam of monochromatic light of wavelength 5000 A° is incident normally on a single narrow slit of width 0.001 mm. The light is focused by a convex lens on a screen placed on the focal plane. The first minimum will be formed for the angle of diffraction equal to,
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 55
Diffraction of light was discovered by,
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 56
To observe diffraction, the size of an obstacle,
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 57
Yellow light is used in a single slit diffraction experiment with slit-width of 0.6 mm. If yellow light is replaced by X-rays, then the observed pattern will reveal,
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 58
In Fresnel's class of diffraction, the:
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 59
The X-rays cannot be diffracted by means of an ordinary grating due to:
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 60
When the diffraction pattern from a certain slit illuminated with laser light λ=6330 A° is projected on a screen 150 cm from the slit, the second minima on each side are separated by 8 cm. This tells us that: