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

When light propagates through a given homogeneous medium, the velocities of

A
primary wavefront are larger than those of secondary wavelets.
B
primary wavefronts are lesser than those of secondary wavelets.
C
primary wavefronts are greater than or equal to those of secondary wavelets.
D
primary wavefront and wavelets are equal.
2
KCET 2023
MCQ (Single Correct Answer)
+1
-0

An unpolarised light of intensity $$I$$ is passed through two polaroids kept one after the other with their planes parallel to each other. The intensity of light emerging from second polaroid is $$\frac{I}{4}$$. The angle between the pass axes of the polaroids is

A
$$45^{\circ}$$
B
$$0^{\circ}$$
C
$$60^{\circ}$$
D
$$30^{\circ}$$
3
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
$$16 \times 10^{-2} \mathrm{~Wm}^{-2}$$
4
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
KCET Subjects
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12