Recent questions tagged #sub

0 votes

0 answers

Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW. Find the energy and momentum of each photon in the light

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

0 votes

0 answers

Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW. How many photons per second, on the average, arrive at a target irradiated by this beam? (Assume the beam to have uniform cross-section which is less than the target

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

0 votes

0 answers

Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW. How fast does a hydrogen atom have to travel in order to have the same momentum as that of the

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

0 votes

0 answers

The energy flux of sunlight reaching the surface of the earth is 1.388 × 103 W/m2 . How many photons (nearly) per square metre are incident on the Earth per second? Assume that the photons in the sunlight have an average wavelength of 550

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

0 votes

0 answers

In an experiment on photoelectric effect, the slope of the cut-off voltage versus frequency of incident light is found to be 4.12 × 10–15 V s. Calculate the value of Planck’s

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

0 votes

0 answers

A 100W sodium lamp radiates energy uniformly in all directions. The lamp is located at the centre of a large sphere that absorbs all the sodium light which is incident on it. The wavelength of the sodium light is 589 nm. What is the energy per photon associated with

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

0 votes

0 answers

A 100W sodium lamp radiates energy uniformly in all directions. The lamp is located at the centre of a large sphere that absorbs all the sodium light which is incident on it. The wavelength of the sodium light is 589 nm. At what rate are the photons delivered to

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

0 votes

0 answers

The threshold frequency for a certain metal is 3.3 × 1014 Hz. If light of frequency 8.2 × 1014 Hz is incident on the metal, predict the cutoff voltage for the photoelectric

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

0 votes

0 answers

The work function for a certain metal is 4.2 eV. Will this metal give photoelectric emission for incident radiation of wavelength 330

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

0 votes

0 answers

Light of frequency 7.21 × 1014 Hz is incident on a metal surface. Electrons with a maximum speed of 6.0 × 105 m/s are ejected from the surface. What is the threshold frequency for photoemission of

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

0 votes

0 answers

Light of wavelength 488 nm is produced by an argon laser which is used in the photoelectric effect. When light from this spectral line is incident on the emitter, the stopping (cut-off) potential of photoelectrons is 0.38 V. Find the work function of the material from which the emitter is

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

0 votes

0 answers

Calculate the(a) momentum, (b) de Broglie wavelength of the electrons accelerated through a potential difference of

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

0 votes

0 answers

What is the(a) momentum, (b) speed, (c) de Broglie wavelength of an electron with kinetic energy of 120

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

0 votes

0 answers

The wavelength of light from the spectral emission line of sodium is 589 nm. Find the kinetic energy at which(i) an electron, (ii) a neutron, would have the same de Broglie

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

0 votes

0 answers

What is the de Broglie wavelength of a bullet of mass 0.040 kg travelling at the speed of 1.0

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

0 votes

0 answers

What is the de Broglie wavelength of a ball of mass 0.060 kg moving at a speed of 1.0

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

0 votes

0 answers

What is the de Broglie wavelength of a dust particle of mass 1.0 × 10–9 kg drifting with a speed of 2.2

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

0 votes

0 answers

An electron and a photon each have a wavelength of 1.00 nm. Find their

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

0 votes

0 answers

An electron and a photon each have a wavelength of 1.00 nm. Find the energy of the

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

0 votes

0 answers

An electron and a photon each have a wavelength of 1.00 nm. Find the kinetic energy of

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

Recent questions tagged #sub

Categories