Recent questions tagged chapter11

0 votes

0 answers

Do all the electrons that absorb a photon come out as

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

There are two sources of light, each emitting with a power of 100 W. One emits X-rays of wavelength 1nm and the other visible light at 500 nm. Find the ratio of number of photons of X-rays to the photons of visible light of the given

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Consider Fig. for photoemission. how would you reconcile with momentum-conservation? Note light (photons) have momentum in a different direction than the emitted

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Consider a metal exposed to light of wavelength 600 nm. The maximum energy of the electron doubles when light of wavelength 400 snm is used. Find the work function in

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Assuming an electron is confined to a 1nm wide region , find the uncertainty in momentum using Heisenberg Uncertainty principle (Ref Eq 11.12 of NCERT Textbook). You can assume the uncertainty in position Δx as 1nm. Assuming `p approx Delta p` , find the energy of the electron in electron

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Two monochromatic beams A and B of equal intensity I, hit a screen. The number of photons hitting the screen by beam A i twice that by beam B. Then what inference can you make about their

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Two particles A and B of de Broglie wavelengths λ1 and λ2 combine to form a particle C. The process conserves momentum. Find the de Broglie wavelength of the particle C. (The motion is one

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A neutron beam of energy E scatters from atoms on a surface with a spacing d = 0.1nm. The first maximum of intensity in the reflected beam occurs at θ = 30°. What is the kinetic energy E of the beam in

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Consider a thin target (10–2m square, 10–3m thickness) of sodium, which produces a photocurrent of 100μA when a light of intensity 100W/m2 (λ = 660nm) falls on it. Find the probability that a photoelectron is produced when a photons strikes a sodium atom. [Take density of Na = 0.97

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Consider an electron in front of metallic surface at a distance d (treated as an infinite plane surface). Assume the force of attraction by the plate is given as `1/4q^2/(4piε_0d^2)` Calculate work in taking the charge to an infinite distance from the plate. Taking d = 0.1nm, find the work done in electron volts. [Such a force law is not valid for d <

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A student performs an experiment on photoelectric effect, using two materials A and B. A plot of Vstop vs ν is given in Fig. Which material A or B has a higher work

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A student performs an experiment on photoelectric effect, using two materials A and B. A plot of Vstop vs ν is given in Fig. Given the electric charge of an electron = 1.6 × 10–19 C, find the value of h obtained from the experiment for both A

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A particle A with a mass mA is moving with a velocity v and hits a particle B (mass mB) at rest (one dimensional motion). Find the change in the de Broglic wavelength of the particle A. Treat the collision as

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Consider a 20 W bulb emitting light of wavelength 5000 A ° and shining on a metal surface kept at a distance 2m. Assume that the metal surface has work function of 2 eV and that each atom on the metal surface can be treated as a circular disk of radius 1.5 A ° .

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Consider a 20 W bulb emitting light of wavelength 5000 A ° and shining on a metal surface kept at a distance 2m. Assume that the metal surface has work function of 2 eV and that each atom on the metal surface can be treated as a circular disk of radius 1.5 A ° .

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Consider a 20 W bulb emitting light of wavelength 5000 A ° and shining on a metal surface kept at a distance 2m. Assume that the metal surface has work function of 2 eV and that each atom on the metal surface can be treated as a circular disk of radius 1.5 A ° .

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Consider a 20 W bulb emitting light of wavelength 5000 A ° and shining on a metal surface kept at a distance 2m. Assume that the metal surface has work function of 2 eV and that each atom on the metal surface can be treated as a circular disk of radius 1.5 A ° .

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Consider a 20 W bulb emitting light of wavelength 5000 A ° and shining on a metal surface kept at a distance 2m. Assume that the metal surface has work function of 2 eV and that each atom on the metal surface can be treated as a circular disk of radius 1.5 A ° .

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Why is mercury used in making

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

How would a thermometer be different if glass expanded more with increasing temperature than

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

Recent questions tagged chapter11

Categories