MEDIUM

JEE Main

IMPORTANT

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In a Young's double slit experiment, an angular width of the fringe is $0.35 °$ on a screen placed at $2 m$ away for particular wavelength of $450 nm$ . The angular width of the fringe, when whole system is immersed in a medium of refractive index $\frac{7}{5}$ , is $\frac{1}{α}$ . The value of $α$ is _____ .

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Important Questions on Wave Optics

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 29 June 2022 Shift 1>Q 78

Using Young's double slit experiment, a monochromatic light of wavelength

5000 Å

produces fringes of fringe width

0.5 mm

. If another monochromatic light of wavelength

6000 Å

is used and the separation between the slits is doubled, then the new fringe width will be

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 29 June 2022 Shift 2>Q 79

In a double slit experiment with monochromatic light, fringes are obtained on a screen placed at some distance from the plane of slits. If the screen is moved by

5 \times 10^{- 2} m

towards the slits, the change in fringe width is

3 \times 10^{- 3} cm

. If the distance between the slits is

1 mm

, then the wavelength of the light will be____

nm

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 26 July 2022 Shift 1>Q 80

In young's double slit experiment, the fringe width is

12 mm

. If the entire arrangement is placed in water of refractive index

\frac{4}{3}

, then the fringe width becomes (in

mm

)

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 27 July 2022 Shift 1>Q 81

A microscope was initially placed in air (refractive index

1

). It is then immersed in oil (refractive index

2

). For a light whose wavelength in air is $\lambda$, calculate the change of microscope's resolving power due to oil and choose the correct option

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 27 July 2022 Shift 1>Q 82

Two beams of light having intensities

I

and

4 I

interfere to produce a fringe pattern on a screen. The phase difference between the two beams are

\frac{π}{2}

and

\frac{π}{3}

at points

A

and

B

respectively. The difference between the resultant intensities at the two points is

x I

. The value of

x

will be _____ .

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 27 July 2022 Shift 2>Q 83

Two coherent sources of light interfere. The intensity ratio of two sources is

1 : 4

. For this interference pattern if the value of

\frac{I_{\max} + I_{\min}}{I_{\max} - I_{\min}}

is equal to

\frac{2 α + 1}{β + 3}

, then

\frac{α}{β}

will be

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 28 July 2022 Shift 1>Q 84

In a Young's double slit experiment, a laser light of

560 nm

produces an interference pattern with consecutive bright fringes' separation of

7.2 mm

. Now another light is used to produce an interference pattern with consecutive bright fringes' separation of

8.1 mm

. The wavelength of second light is _____

nm .

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 19 - Wave Optics>JEE Main - 29 July 2022 Shift 1>Q 85

Two light beams of intensities

4 I

and

9 I

interfere on a screen. The phase difference between these beams on the screen at point

A

is zero and at point

B

π

. The difference of resultant intensities, at the point

A

and

B

, will be _____

I

In a Young's double slit experiment, an angular width of the fringe is 0.35° on a screen placed at 2 m away for particular wavelength of 450 nm. The angular width of the fringe, when whole system is immersed in a medium of refractive index 75, is 1α. The value of α is _____ .

Important Questions on Wave Optics

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