JEE Main 2024 (Online) 1st February Evening Shift | Wave Optics Question 58 | Physics

A microwave of wavelength $2.0 \mathrm{~cm}$ falls normally on a slit of width $4.0 \mathrm{~cm}$. The angular spread of the central maxima of the diffraction pattern obtained on a screen $1.5 \mathrm{~m}$ away from the slit, will be :

$60^{\circ}$

$45^{\circ}$

$15^{\circ}$

$30^{\circ}$

JEE Main 2024 (Online) 1st February Morning Shift

MCQ (Single Correct Answer)

-1

A monochromatic light of wavelength $6000 ~\mathring{A}$ is incident on the single slit of width $0.01 \mathrm{~mm}$. If the diffraction pattern is formed at the focus of the convex lens of focal length $20 \mathrm{~cm}$, the linear width of the central maximum is :

$12 \mathrm{~mm}$

$24 \mathrm{~mm}$

$60 \mathrm{~mm}$

$120 \mathrm{~mm}$

JEE Main 2024 (Online) 31st January Evening Shift

MCQ (Single Correct Answer)

-1

When unpolarized light is incident at an angle of $$60^{\circ}$$ on a transparent medium from air, the reflected ray is completely polarized. The angle of refraction in the medium is:

$$60^{\circ}$$

$$90^{\circ}$$

$$30^{\circ}$$

$$45^{\circ}$$

JEE Main 2024 (Online) 30th January Evening Shift

MCQ (Single Correct Answer)

-1

A beam of unpolarised light of intensity $$I_0$$ is passed through a polaroid $$A$$ and then through another polaroid $$B$$ which is oriented so that its principal plane makes an angle of $$45^{\circ}$$ relative to that of $$A$$. The intensity of emergent light is:

$$I_0 / 2$$

$$I_0 / 8$$

$$I_0 / 4$$

$$I_0$$

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