MHT CET 2023 9th May Evening Shift | Wave Optics Question 74 | Physics

In Young's double slit experiment, the fringe width is $$2 \mathrm{~mm}$$. The separation between the $$13^{\text {th }}$$ bright fringe and the $$4^{\text {th }}$$ dark fringe from the centre of the screen on same side will be

$$13 \mathrm{~mm}$$.

$$17 \mathrm{~mm}$$.

$$19 \mathrm{~mm}$$.

$$23 \mathrm{~mm}$$.

MHT CET 2023 9th May Morning Shift

MCQ (Single Correct Answer)

-0

A beam of unpolarized light passes through a tourmaline crystal A and then it passes through a second tourmaline crystal B oriented so that its principal plane is parallel to that of A. The intensity of emergent light is $$I_0$$. Now B is rotated by $$45^{\circ}$$ about the ray. The emergent light will have intensity $$\left(\cos 45^{\circ}=\frac{1}{\sqrt{2}}\right)$$

$$\frac{\mathrm{I}_0}{2}$$

$$\frac{\mathrm{I}_0}{\sqrt{2}}$$

$$\frac{\sqrt{2}}{\mathrm{I}_0}$$

$$\frac{2}{\mathrm{I}_0}$$

MHT CET 2023 9th May Morning Shift

MCQ (Single Correct Answer)

-0

In a diffraction pattern due to single slit of width '$$a$$', the first minimum is observed at an angle of $$30^{\circ}$$ when the light of wavelength $$5400 \mathop A\limits^o$$ is incident on the slit. The first secondary maximum is observed at an angle of $$\left(\sin 30^{\circ}=\frac{1}{2}\right)$$

$$\sin ^{-1}\left(\frac{3}{4}\right)$$

$$\sin ^{-1}\left(\frac{2}{3}\right)$$

$$\sin ^{-1}\left(\frac{1}{2}\right)$$

$$\sin ^{-1}\left(\frac{1}{4}\right)$$

MHT CET 2023 9th May Morning Shift

MCQ (Single Correct Answer)

-0

In a single slit experiment, the width of the slit is doubled. Which one of the following statements is correct?

The intensity and width of the central maximum are unaffected.

The intensity remains same and angular width becomes half.

The intensity and angular width both are doubled.

The intensity increases by a factor 4 and the angular width decreases by a factor of $$\frac{1}{2}$$.

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