1
KCET 2023
MCQ (Single Correct Answer)
+1
-0

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

A
$$8 \times 10^{-2} \mathrm{~Wm}^{-2}$$
B
$$4 \times 10^{-2} \mathrm{~Wm}^{-2}$$
C
$$2 \times 10^{-2} \mathrm{~Wm}^{-2}$$
D
$$16 \times 10^{-2} \mathrm{~Wm}^{-2}$$
2
KCET 2022
MCQ (Single Correct Answer)
+1
-0

For light diverging from a finite point source,

A
the intensity decreases in proportion to the distance squared
B
the wavefront is parabolic
C
the intensity at the wave front does not depend on the distance
D
the wave front is cylindrical
3
KCET 2022
MCQ (Single Correct Answer)
+1
-0

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

A
2 times
B
4 times
C
8 times
D
3 times
4
KCET 2022
MCQ (Single Correct Answer)
+1
-0

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

A
Central bright band having alternate dark and bright bands of decreasing intensity on either side.
B
Central dark band having uniform brightness on either side.
C
Central bright band having dark bands on either side.
D
Central dark band having alternate dark and bright bands of decreasing intensity on either side.
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