JEE Main 2021 (Online) 25th February Morning Shift | Wave Optics Question 119 | Physics

Two coherent light sources having intensity in the ratio 2x produce an interference pattern. The ratio $${{{I_{\max }} - {I_{\min }}} \over {{I_{\max }} + {I_{\min }}}}$$ will be :

$${{2\sqrt {2x} } \over {2x + 1}}$$

$${{2\sqrt {2x} } \over {x + 1}}$$

$${{\sqrt {2x} } \over {x + 1}}$$

$${{\sqrt {2x} } \over {2x + 1}}$$

JEE Main 2021 (Online) 24th February Evening Shift

MCQ (Single Correct Answer)

-1

If the source of light used in a Young's double slit experiment is changed from red to violet :

the fringes will become brighter.

the intensity of minima will increase.

consecutive fringe lines will come closer.

the central bright fringe will become a dark fringe.

JEE Main 2021 (Online) 24th February Morning Shift

MCQ (Single Correct Answer)

-1

In a Young's double slit experiment, the width of the one of the slit is three times the other slit. The amplitude of the light coming from a slit is proportional to the slit-width. Find the ratio of the maximum to the minimum intensity in the interference pattern.

4 : 1

2 : 1

1 : 4

3 : 1

JEE Main 2020 (Online) 6th September Morning Slot

MCQ (Single Correct Answer)

-1

In the figure below, P and Q are two equally intense coherent sources emitting radiation of wavelength 20 m. The separation between P and Q is 5 m and the phase of P is ahead of that of Q by 90^o. A, B and C are three distinct points of observation, each equidistant from the midpoint of PQ. The intensities of radiation at A, B, C will be in the ratio :

JEE Main 2020 (Online) 6th September Morning Slot Physics - Wave Optics Question 122 English