Wave Optics [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 58 - 62 of 92

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Question 58

Question MCQ▾

When the light source is moving towards the observer,

Choices

Choice (4)Response

a.

The wavelength of light decreases

b.

The wavelength of light remains same

c.

The wavelength of light increases

d.

The velocity of light increases

Edit

Question 59

Question MCQ▾

Two waves originating from source S1 and S2 having zero phase difference and common wavelength X will show completely destructive interference at a point P if (S1 P - S2 P) is-

Choices

Choice (4)Response

a.

b.

2 λ

c.

d.

Edit

Question 60

Question MCQ▾

In a Young՚s double slit experiment, the separation between the slits is 0.10 mm, the wavelength of light used is 600 nm and the interference pattern is observed on a screen 1.0 m away. Find the separation between the successive bright fringes.

Choices

Choice (4)Response

a.

6.6 mm

b.

6 cm

c.

6.0 mm

d.

6 m

Edit

Question 61

Question MCQ▾

Width of slit is 0.3 mm Fraunhofer diffraction is observed in focus plane of lens of a lens of focal length 1 m. If third minima is at 5 mm distance from central maxima, then wavelength of light is-

Choices

Choice (4)Response

a.

5000 Å

b.

6000 Å

c.

7000 Å

d.

6500 Å

Edit

Question 62

Appeared in Year: 1999 (AIIMS)

Question MCQ▾

In Young՚s experiment, monochromatic light is used to illuminate the two slits A and B. Interference fringes are observed on a screen placed in front of the slits. Now if a thin glass plate is placed normally in the path of the beam coming from the slit then – [AIIMS]

Monochromatic Light Illuminate Two Slits

Choices

Choice (4)Response

a.

The fringes will disappear

b.

There will be no change in the fringe width

c.

The fringe width will decrease

d.

The fringe width will increase

Edit