JEE Main 2025 (Online) 22nd January Morning Shift | Wave Optics Question 21 | Physics

Assertion-(A) : If Young's double slit experiment is performed in an optically denser medium than air, then the consecutive fringes come closer.

Reason-(R) : The speed of light reduces in an optically denser medium than air while its frequency does not change.

In the light of the above statements, choose the most appropriate answer from the options given below :

(A) is false but (R) is true

Both (A) and (R) are true but (R) is not the correct explanation of (A)

Both (A) and (R) are true and (R) is the correct explanation of (A)

(A) is true but (R) is false

JEE Main 2024 (Online) 5th April Evening Shift

MCQ (Single Correct Answer)

-1

Given below are two statements :

Statement I : When the white light passed through a prism, the red light bends lesser than yellow and violet.

Statement II : The refractive indices are different for different wavelengths in dispersive medium. In the light of the above statements, chose the correct answer from the options given below :

Both Statement I and Statement II are true

Statement I is true but Statement II is false

Statement I is false but Statement II is true

Both Statement I and Statement II are false

JEE Main 2024 (Online) 5th April Morning Shift

MCQ (Single Correct Answer)

-1

Light emerges out of a convex lens when a source of light kept at its focus. The shape of wavefront of the light is :

cylindrical

spherical

plane

both spherical and cylindrical

JEE Main 2024 (Online) 4th April Evening Shift

MCQ (Single Correct Answer)

-1

The width of one of the two slits in a Young's double slit experiment is 4 times that of the other slit. The ratio of the maximum of the minimum intensity in the interference pattern is:

$$1: 1$$

$$4: 1$$

$$16: 1$$

$$9: 1$$

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