Question Answers

Atomic masses of He and Ne are 4 and 20 amu respectively. The value of the de Broglie wavelength of He gas −73 degree C is “M” times that of the de Broglie wavelength of Ne at 727 degree C. What is the value of M? at a distance r from the nucleus. The volume [...]

In an atom, the total number of electrons having quantum numbers n = 4,∣ ml ∣ = 1 and ms = −1/2 are: ∣ ml ∣ = 1 and ms = −1/2 are: In an atom the total number of electrons having quantum numbers n = 4 November 9, 2020 Category: Chapter 2 - Atomic [...]

Not considering the electronic spin, the degeneracy of the second excited state (n=3) of H-atom is 9, while the degeneracy of the second excited state of H^− is Not considering the electronic spin the degeneracy of the second excited state (n=3) of H-atom is 9 while the degeneracy of the second excited state of H^− [...]

A disc is placed on a surface of pond which has refractive index 35 . A source of light is placed 4 m below the surface of liquid. The minimum radius of disc will be so light is not coming out A disc is placed on a surface of pond which has refractive index 35 [...]

The wavelength of the red light from a helium-neon laser is 633 nm in air but 474 nm in the aqueous humor inside your eyeball. Then the speed of red light through the aqueous humor is. The wavelength of the red light from a helium-neon laser is 633 nm in air but 474 nm in [...]

A ray of light travelling through rarer medium is incident at very small angle i on a glass slab and after refraction its velocity is reduced by 20%. The angle of deviation is : A ray of light travelling through rarer medium is incident at very small angle i on a glass slab and after [...]

A vessel of depth x is half filled with oil of refractive index μ1 ​and the other half is filled with water of refractive index μ2 . The apparent depth of the vessel when viewed from above is: A vessel of depth x is half filled with oil of refractive index μ1 ​and the other [...]

The bottom of a container is a 4.0 cm thick glass slab. The container contains two immiscible liquids A (μ=1.4) and B (μ=1.3) of depths 6.0 cm and 8.0 cm respectively. What is the apparent position of a scratch on the outer surface of the bottom of the glass slab when viewed through the container? [...]

A vessel of depth d cm is half filled with a liquid of refractive index n1 and the upper half is occupied by the immiscible liquid of refractive index n2. Viewing it from an eye in the upper liquid, the apparent depth of the lower liquid is A vessel of depth d cm is half [...]

A diverging beam of light from a point source S having divergence angle α, falls symmetrically on a glass slab as shown. The angles of incidence of the two extreme rays are equal. If the thickness of the glass slab is t and the refractive index u, then the divergence angle of the emergent beam [...]