KCET 2023 | Wave Optics Question 3 | Physics

In the Young's double slit experiment, the intensity of light passing through each of the two double slits is $$2 \times 10^{-2} \mathrm{~Wm}^{-2}$$. The screen-slit distance is very large in comparison with slit-slit distance. The fringe width is $$\beta$$. The distance between the central maximum and a point $$P$$ on the screen is $$x=\frac{\beta}{3}$$. Then, the total light intensity at the point is

$$8 \times 10^{-2} \mathrm{~Wm}^{-2}$$

$$4 \times 10^{-2} \mathrm{~Wm}^{-2}$$

$$2 \times 10^{-2} \mathrm{~Wm}^{-2}$$

$$16 \times 10^{-2} \mathrm{~Wm}^{-2}$$

KCET 2022

MCQ (Single Correct Answer)

-0

For light diverging from a finite point source,

the intensity decreases in proportion to the distance squared

the wavefront is parabolic

the intensity at the wave front does not depend on the distance

the wave front is cylindrical

KCET 2022

MCQ (Single Correct Answer)

-0

The fringe width for red colour as compared to that for violet colour is approximately

2 times

4 times

8 times

3 times

KCET 2022

MCQ (Single Correct Answer)

-0

In case of Fraunhoffer diffraction at a single slit, the diffraction pattern on the screen is correct for which of the following statements?

Central bright band having alternate dark and bright bands of decreasing intensity on either side.

Central dark band having uniform brightness on either side.

Central bright band having dark bands on either side.

Central dark band having alternate dark and bright bands of decreasing intensity on either side.

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