Wave Optics

Two slits in Young's double slit experiment are \(1.5\mathrm{mm}\) apart and the screen is placed at a distance of \(1\mathrm{m}\) from the slits. If the wavelength of light used is \(600\times {10}^{-9}\mathrm{m}\) then the fringe separation is :

[Re-NEET 2024]

An unpolarised light beam strikes a glass surface at Brewster's angle. Then

[NEET 2024]

In interference and diffraction, the light energy is redistributed. If it reduces in one region, producing a dark fringe, it increases in another region, producing a bright fringe.
A. As there is no gain or loss of energy, these phenomena are consistent with the principle of conservation of energy.
B. Diffraction and interference are characteristics exhibited only by light waves.
Choose the correct answer from the options given below

Two slits in Young's double slit experiment are \(1.5\mathrm{mm}\) apart and the screen is placed at a distance of \(1\mathrm{m}\) from the slits. If the wavelength of light used is \(600\times {10}^{-9}\mathrm{m}\) then the fringe separation is :

[Re-NEET 2024]

If the monochromatic source in Young's double slit experiment is replaced by white light, then

[NEET 2024]

Two slits in Young's double slit experiment are \(1.5\mathrm{mm}\) apart and the screen is placed at a distance of \(1\mathrm{m}\) from the slits. If the wavelength of light used is \(600\times {10}^{-9}\mathrm{m}\) then the fringe separation is :

[Re-NEET 2024]

If the monochromatic source in Young's double slit experiment is replaced by white light, then

[NEET 2024]

The intensity of transmitted light when a polaroid sheet, placed between two crossed polaroids at \(22.5^\circ\) from the polarization axis of one of the polaroid is ( \({\mathrm{I}}_{0}\) is the intensity of polarised light, after passing through the first polaroid):

[NEET 2025]

In Young's double slits experiment, the position of \(5^{\text {th }}\) bright fringe from the central maximum is \(5 cm\). The distance between slits and the screen is \(1 m\) and wavelength of monochromatic light used is \(600 nm\). The separation between the slits is:

In Young's double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes :

[NEET 2020]

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

The width of one of the two slits in a Young's double slit experiment is 4 times that of the other slit. The ratio of the maximum to the minimum intensity in the interference pattern is:EndFragment

Assume that light of wavelength \( 600 \mathrm{~nm} \) is coming from a star. The limit of resolution of telescope whose objective has a diameter of \( 2 \mathrm{~m} \) is :

[NEET 2020]

The width of fringe is \(2 mm\) on the screen in a double slits experiment for the light of wavelength of \(400 nm\). The width of the fringe for the light of wavelength 600 nm will be:

[JEE Main 2023, 8 Apr (Shift 2)]

In Young's double slit experiment, if the source of light changes from orange to blue then:

[JEE Main 2021, 27 Jul (Shift 1)]

' \(n\) ' polarizing sheets are arranged such that each makes an angle \(45^{\circ}\) with the preceeding sheet. An unpolarized light of intensity \(I\) is incident into this arrangement. The output intensity is found to be \(\frac{I}{64}\). The value of \(n\) will be:

The Brewsters angle \({i}_{b}\)for an interface should be :

[NEET 2020]

Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : In Young's double slit experiment, the fringes produced by red light are closer as compared to those produced by blue light.
Reason (R) : The fringe width is directly proportional to the wavelength of light.
In the light of the above statements, choose the correct answer from the options given below :

Two polaroids \(A\) and \(B\) are placed in such a way that the pass-axis of polaroids are perpendicular to each other. Now, another polaroid \(C\) is placed between \(A\) and \(B\) bisecting the angle between them. If intensity of unpolarised light is \(I_0\) then intensity of transmitted light after passing through polaroid B will be:

[JEE Main 2023, 31 Jan (Shift 1)]

Consider the diffraction pattern obtained from the sunlight incident on a pinhole of diameter \(0.1 \mu m\). If the diameter of the pinhole is slightly increased, it will affect the diffraction pattern such that:

[JEE Main 2021, 25 Feb (Shift 2)]

' \(n\) ' polarizing sheets are arranged such that each makes an angle \(45^{\circ}\) with the preceding sheet. An unpolarized light of intensity \(I\) is incident into this arrangement. The output intensity is found to be \(\frac{I}{64}\). The value of \(n\) will be: