1

JEE Main 2021 (Online) 26th August Morning Shift

Numerical

+4

-1

White light is passed through a double slit and interference is observed on a screen 1.5 m away. The separation between the slits is 0.3 mm. The first violet and red fringes are formed 2.0 mm and 3.5 mm away from the central white fringes. the difference in wavelengths of red and violet light is ................ nm.

Your input ____

2

JEE Main 2021 (Online) 27th July Evening Shift

Numerical

+4

-1

The difference in the number of waves when yellow light propagates through air and vacuum columns of the same thickness is one. The thickness of the air column is ___________ mm. [Refractive index of air = 1.0003, wavelength of yellow light in vacuum = 6000 $$\mathop A\limits^o $$]

Your input ____

3

JEE Main 2021 (Online) 18th March Evening Shift

Numerical

+4

-1

A galaxy is moving away from the earth at a speed of 286 kms

^{$$-$$1}. The shift in the wavelength of a redline at 630 nm is x $$\times$$ 10^{$$-$$10}m. The value of x, to the nearest integer, is ____________. [Take the value of speed of light c, as 3 $$\times$$ 10^{8}ms^{$$-$$1}]Your input ____

4

JEE Main 2021 (Online) 16th March Morning Shift

Numerical

+4

-1

A fringe width of 6 mm was produced for two slits separated by 1 mm apart. The screen is placed 10 m away. The wavelength of light used is 'x' nm. The value of 'x' to the nearest integer is ____________.

Your input ____

Questions Asked from Wave Optics (Numerical)

Number in Brackets after Paper Indicates No. of Questions

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