Wave Optics

10.4 Distance between the slits, d = 0.28 mm = 0.28 $*{10}^{-3}$ m

Distance between the slits and the screen, D = 1.4 m

Distance between the central bright fringe and the fourth ( n = 4) fringe, u = 1.2 cm = 1.2 $*{10}^{-2}$ m

In case of a constructive interference, we have the relation for the distan

10.3 The refractive index of glass,  $?$ = 1.5

Speed of light in vacuum, c = 3.0 $*{10}^8$ m/s

Speed of light in glass is given by the relation,  $v$ = $\frac{c}{?}$ = $\frac{3.0\mathrm{}*{10}^8}{1.5}$ = 2 $*{10}^8$ m/s

The speed of light in glass is not independent of the colours of light. The refractive index

Ans.10.2 The shape of the wave front in case of a light diverging from a point source is spherical.

The shape of the wave front in case of a light emerging out of a convex lens when a point source is placed at its focus is a parallel grid.

The portion of the wave front of light from a distant star int

10.1 Wavelength of incident monochromatic light, $?$ = 589 nm = 589 $\times {10}^{-9}$ m

Speed of light in air, c = 3 $\times {10}^8$ m/s

Refractive index of water, $?$ = 1.33

In case of reflection, the ray goes back to the same medium. Hence wavelength, frequency and speed of reflected beam will be s

Diffraction leads to the formation of patterns of varying intensity. When around obstacles, waves bend and spread through the narrow opening, it is called diffraction. The interference results in a new wave pattern and involves the superposition of two or more coherent waves. Both these phenomena pr

A coherent light source in Young's Double Slit Experiment illuminates two closely spaced slits, and produces two overlapping light waves. The interference of these waves constructively or destructively based on their phase difference lead to a pattern of bright and dark fringes on a screen, When the

According to Chapter 10 Physics Class 12, the Huygens' Principle in wave optics states that every point on a wave front spreads out in all directions at the speed of the wave, and these act as a source of secondary wavelets. According to this principle, all new wave front is the tangent to these sec

The Davisson-Germer experiment was conducted to test the De-broglie hypothesis and know wave nature of electrons. In this experiment, a beam of electrons was emitted from an electron gun with known acceleration to strike a nickel crystal placed inside a vacuum chamber.

After striking the surface, ele

Significance of de Broglie's Hypothesis in Modern Physics (NCERT-based answer):

De Broglie's hypothesis is a revolutionary idea which changed the understanding of matter and wave as we know it. This hypothesis introduced the concept that particles of matter, like electrons, and Proton, can behave lik

The photoelectric effect when light is projected in a metal surface, it's surface ejects electron (which are in outermost shell or free electron). This happens because the light provides additional energy to the electron to detach itself from metal surface. Well to do this light must have a certain