1
JEE Main 2025 (Online) 8th April Evening Shift
MCQ (Single Correct Answer)
+4
-1

In a Young's double slit experiment, the source is white light. One of the slits is covered by red filter and another by a green filter. In this case:

A

there shall be alternate interference fringes of red and green.

B

there shall be an interference pattern for red distinct from that for green.

C

there shall be an interference pattern, where each fringe's pattern center is green and outer edges is red.

D

there shall be no interference fringes.

2
JEE Main 2025 (Online) 7th April Morning Shift
MCQ (Single Correct Answer)
+4
-1

Two plane polarized light waves combine at a certain point whose electric field components are

$$\begin{aligned} & E_1=E_0 \operatorname{Sin} \omega t \\ & E_2=E_0 \operatorname{Sin}\left(\omega t+\frac{\pi}{3}\right) \end{aligned}$$

Find the amplitude of the resultant wave.

A
$1.7 \mathrm{~E}_0$
B
$\mathrm{E}_0$
C
$0.9 \mathrm{~E}_0$
D
$3.4 \mathrm{~E}_0$
3
JEE Main 2025 (Online) 4th April Evening Shift
MCQ (Single Correct Answer)
+4
-1

Two polarisers $P_1$ and $P_2$ are placed in such a way that the intensity of the transmitted light will be zero. A third polariser $P_3$ is inserted in between $P_1$ and $P_2$, at particular angle between $P_2$ and $P_3$. The transmitted intensity of the light passing the through all three polarisers is maximum. The angle between the polarisers $P_2$ and $P_3$ is :

A
$\pi / 6$
B
$\frac{\pi}{3}$
C
$\frac{\pi}{4}$
D
$\pi / 8$
4
JEE Main 2025 (Online) 4th April Morning Shift
MCQ (Single Correct Answer)
+4
-1

In a Young's double slit experiment, the slits are separated by 0.2 mm . If the slits separation is increased to 0.4 mm , the percentage change of the fringe width is :

A
$25 \%$
B
$50 \%$
C
$0 \%$
D
$100 \%$
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