JEE Main 2025 (Online) 22nd January Evening Shift | Wave Optics Question 19 | Physics

JEE Main 2025 (Online) 22nd January Evening Shift

MCQ (Single Correct Answer)

-1

A transparent film of refractive index, 2.0 is coated on a glass slab of refractive index, 1.45. What is the minimum thickness of transparent film to be coated for the maximum transmission of Green light of wavelength 550 nm . [Assume that the light is incident nearly perpendicular to the glass surface.]

68.7 nm

137.5 nm

94.8 nm

275 nm

JEE Main 2025 (Online) 22nd January Evening Shift

MCQ (Single Correct Answer)

-1

Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : In Young's double slit experiment, the fringes produced by red light are closer as compared to those produced by blue light.

Reason (R) : The fringe width is directly proportional to the wavelength of light.

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

(A) is true but (R) is false

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

(A) is false but (R) is true

Both $(\mathbf{A})$ and $(\mathbf{R})$ are true but $(\mathbf{R})$ is NOT the correct explanation of (A)

JEE Main 2025 (Online) 22nd January Morning Shift

MCQ (Single Correct Answer)

-1

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

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

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