HARD

JEE Main

IMPORTANT

Earn 100

In a Young's double slit experiment $15$ fringes are observed on a small portion of the screen when light of wavelength $500 n m$ is used. Ten fringes are observed on the same section of the screen when another light source of wavelength $λ$ is used. Find the value of $λ$ (in $n m$ ) .

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Important Questions on Wave Optics

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 9th April 2019 Shift 1>Q 37

The figure shows a Young's double slit experimental setup. It is observed that when a thin transparent sheet of thickness t and refractive index

μ

is put in front of one of the slits, the central maximum gets shifted by a distance equal to n fringe width. If the wavelength of light used is

λ

then

t

will be:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 9th April 2019 Shift 2>Q 38

Diameter of the objective lens of a telescope is

250 c m .

For light of wavelength

600 n m

coming from a distant object, the limit of resolution of the telescope is close to:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 9th January 2019 Shift 1>Q 39

Two coherent sources produce waves of different intensities which interfere. After interference, the ratio of the maximum intensity to the minimum intensity is

16 .

The intensity of the waves are in the ratio:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 9th January 2019 Shift 2>Q 40

In a Young's double slit experiment, the slits are placed

0.320 mm

apart. Light of wavelength

λ = 500 nm

is incident on the slits. The total number of bright fringes that are observed in the angular range

- 30^{o} \leq θ \leq 30^{o}

is:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 8th April 2019 Shift 1>Q 41

In an interference experiment the ratio of amplitudes of coherent waves is

\frac{a_{1}}{a_{2}} = \frac{1}{3}

. The ratio of maximum and minimum intensities of fringes will be:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 8th April 2019 Shift 2>Q 42

Calculate the limit of resolution of a telescope objective having a diameter of

200 c m

, if it has to detect light of wavelength

500 n m

coming from a star.

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 10th April 2019 Shift 2>Q 43

In a Young's double-slit experiment, the ratio of the slit's width is

4 : 1

. The ratio of the intensity of maxima to minima, close to the central fringe on the screen, will be

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 10th January 2019 Shift 1>Q 44

In a Young's double slit experiment slit separation

0.1 m m,

one observes a bright fringe at angle

\frac{1}{40} r a d

by using light of wavelength

λ_{1} .

When the light of wavelength

λ_{2}

is used a bright fringe is seen at the same angle in the same set up. Given that

λ_{1}

and

λ_{2}

are in visible range

(380 n m t o 740 n m),

their values are:

In a Young's double slit experiment 15 fringes are observed on a small portion of the screen when light of wavelength 500 nm is used. Ten fringes are observed on the same section of the screen when another light source of wavelength λ is used. Find the value of λ (in nm ) .

Important Questions on Wave Optics

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In a Young's double slit experiment $15$ fringes are observed on a small portion of the screen when light of wavelength $500 n m$ is used. Ten fringes are observed on the same section of the screen when another light source of wavelength $λ$ is used. Find the value of $λ$ (in $n m$ ) .