NCERT Exemplar Class 12
Light of wavelength 488 nm is produced by an atom laser which is used in the photoelectric effect. When light from this spectral line is incident on the emitter, the stopping potential of photoelectrons is 0.38 V. Find the work function of the material from which the emitter is made.
07
Jun
Light of wavelength 488 nm is produced by an atom laser which is used in the photoelectric effect. When light from this spectral line is incident on the emitter, the stopping potential of photoelectrons is 0.38 V. Find the work function of the material from which the emitter is made. Light of wavelength 488 nm [...]
Light of frequency 7.21×10^14Hz is incident on a metal surface. Electrons with a maximum speed of 6.0×10^5 ms^−1 are ejected from the surface. What is the threshold frequency for photoemission of electrons?
07
Jun
Light of frequency 7.21×10^14Hz is incident on a metal surface. Electrons with a maximum speed of 6.0×10^5 ms^−1 are ejected from the surface. What is the threshold frequency for photoemission of electrons? Find the (a) maximum frequency and June 7, 2021 Category: Chapter 11 - Dual Nature of Radiation and Matter , NCERT Exemplar Class [...]
The work function for a certain metal is 4.2eV. Will this metal give photoelectric emission for incident radiation of wavelength 330 nm?
07
Jun
The work function for a certain metal is 4.2eV. Will this metal give photoelectric emission for incident radiation of wavelength 330 nm? The work function for a certain metal is 4.2eV. Will this metal give photoelectric emission for incident radiation of wavelength 330 nm? June 7, 2021 Category: Chapter 11 - Dual Nature of Radiation [...]
The threshold frequency of a certain metal is 3.3×10^14Hz. If light of frequency 8.2×10^14Hz is incident on the metal, predict the cut off voltage for photoelectric emission.
07
Jun
The threshold frequency of a certain metal is 3.3×10^14Hz. If light of frequency 8.2×10^14Hz is incident on the metal, predict the cut off voltage for photoelectric emission. predict the cut off voltage for photoelectric emission. The threshold frequency of a certain metal is 3.3×10^14Hz. If light of frequency 8.2×10^14Hz is incident on the metal June [...]
A 100 W 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.
07
Jun
A 100 W 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. Find the (a) maximum frequency and June 7, 2021 Category: Chapter 11 - [...]
The energy flux of the sunlight reaching the surface of the earth is 1.388×10^3Wm^−2. How many photons (nearly) per square meter are incident on the earth per second? Assume that the photons in the sunlight have an average wavelength of 550 nm.
07
Jun
The energy flux of the sunlight reaching the surface of the earth is 1.388×10^3Wm^−2. How many photons (nearly) per square meter are incident on the earth per second? Assume that the photons in the sunlight have an average wavelength of 550 nm. Find the (a) maximum frequency and June 7, 2021 Category: Chapter 11 - [...]
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 Vs. Calculate the value of Planck’s constant.
07
Jun
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 Vs. Calculate the value of Planck’s constant. 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 Vs. Calculate [...]
The photoelectric cut off voltage in a certain experiment is 1.5 V. What is the maximum kinetic energy of photoelectrons emitted?
07
Jun
The photoelectric cut off voltage in a certain experiment is 1.5 V. What is the maximum kinetic energy of photoelectrons emitted? The photoelectric cut off voltage in a certain experiment is 1.5 V. What is the maximum kinetic energy of photoelectrons emitted? June 7, 2021 Category: Chapter 11 - Dual Nature of Radiation and Matter [...]
Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW.
07
Jun
Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW. Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW. June 7, 2021 Category: Chapter 11 - Dual Nature of Radiation and Matter , NCERT Exemplar Class 12 , [...]
The work function of caesium metal is 2.14 eV. When the light of frequency 6×10^14 Hz is incident on the metal surface, photoemission of electrons occurs. What is the
07
Jun
The work function of caesium metal is 2.14 eV. When the light of frequency 6×10^14 Hz is incident on the metal surface, photoemission of electrons occurs. What is the photoemission of electrons occurs. What is the The work function of caesium metal is 2.14 eV. When the light of frequency 6×10^14 Hz is incident on [...]