Fringe width decreases with increase in,

Important Questions on Interference and Diffraction of Light

MEDIUM

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 32

Interference is observed in interference chamber when air is present. Now, the chamber is evacuated and if the same light is used, then for the same arrangement,

MEDIUM

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 33

What happens to the fringe pattern if in the path of one of the slits, a glass plate which absorbs $50\%$ energy is interposed?

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 34

In Young's double slit experiment, the type of diffraction is,

HARD

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 35

Interference fringes are produced in Young's double slit experiment using light of wavelength $5000 \stackrel{\circ }{\mathrm{A}}$. When a film of thickness $2.5\times {10}^{-3} \mathrm{cm}$ is placed in front of one of the slits, the fringe pattern shifts by a distance equal to $20$ fringe widths. The refractive index of the material of the film is,

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 36

The Young's double slit experiment is performed with blue and green lights of wavelengths $4360 \stackrel{\circ }{\mathrm{A}}$ and $5460 \stackrel{\circ }{\mathrm{A}}$, respectively. If $x$ is the distance of $4^{\mathrm{th}}$ maxima from the central one, then,

HARD

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 37

In Young's double slit experiment, wavelength, $\lambda =5000 \stackrel{\circ }{\mathrm{A}}$, the distance between the slits is $0.2 \mathrm{mm}$ and the screen is at a distance of $200 \mathrm{cm}$ from the slits. The central maximum is at $x=0$. The third maximum (taking the central maximum as zeroth maximum) will be at $x$ 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 38

The maximum intensity of fringes in Young's experiment is $I$. If one of the slits is closed, the intensity at that place becomes $I_0$. Which of the following relation is true?

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 39

In Young's double-slit experiment, if the monochromatic source of light is replaced by white light, then one sees,