1
JEE Main 2022 (Online) 30th June Morning Shift
+4
-1

Find the ratio of maximum intensity to the minimum intensity in the interference pattern if the widths of the two slits in Young's experiment are in the ratio of 9 : 16. (Assuming intensity of light is directly proportional to the width of slits)

A
3 : 4
B
4 : 3
C
7 : 1
D
49 : 1
2
JEE Main 2022 (Online) 29th June Evening Shift
+4
-1

The speed of light in media 'A' and 'B' are $$2.0 \times {10^{10}}$$ cm/s and $$1.5 \times {10^{10}}$$ cm/s respectively. A ray of light enters from the medium B to A at an incident angle '$$\theta$$'. If the ray suffers total internal reflection, then

A
$$\theta = {\sin ^{ - 1}}\left( {{3 \over 4}} \right)$$
B
$$\theta > {\sin ^{ - 1}}\left( {{2 \over 3}} \right)$$
C
$$\theta < {\sin ^{ - 1}}\left( {{3 \over 4}} \right)$$
D
$$\theta > {\sin ^{ - 1}}\left( {{3 \over 4}} \right)$$
3
JEE Main 2022 (Online) 29th June Morning Shift
+4
-1

Using Young's double slit experiment, a monochromatic light of wavelength 5000 $$\mathop A\limits^o$$ produces fringes of fringe width 0.5 mm. If another monochromatic light of wavelength 6000 $$\mathop A\limits^o$$ is used and the separation between the slits is doubled, then the new fringe width will be :

A
0.5 mm
B
1.0 mm
C
0.6 mm
D
0.3 mm
4
JEE Main 2022 (Online) 28th June Evening Shift
+4
-1

In Young's double slit experiment performed using a monochromatic light of wavelength $$\lambda$$, when a glass plate ($$\mu$$ = 1.5) of thickness x$$\lambda$$ is introduced in the path of the one of the interfering beams, the intensity at the position where the central maximum occurred previously remains unchanged. The value of x will be :

A
3
B
2
C
1.5
D
0.5
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