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Monochromatic light of frequency 6.0 ×1014 Hz is produced by a laser. The power emitted is 2.0 ×10–3 W. What is the energy of a photon in the light

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Monochromatic light of frequency 6.0 ×1014 Hz is produced by a laser. The power emitted is 2.0 ×10–3 W. How many photons per second, on an average, are emitted by the

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

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The work function of caesium is 2.14 eV. Find the threshold frequency for

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The work function of caesium is 2.14 eV. Find the wavelength of the incident light if the photocurrent is brought to zero by a stopping potential of 0.60

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

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The wavelength of light in the visible region is about 390 nm for violet colour, about 550 nm (average wavelength) for yellowgreen colour and about 760 nm for red colour. What are the energies of photons in (eV) at the (i) violet end, (ii) average wavelength, yellow-green colour, and

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

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The wavelength of light in the visible region is about 390 nm for violet colour, about 550 nm (average wavelength) for yellowgreen colour and about 760 nm for red colour. From which of the photosensitive materials with work functions listed in Table 11.1 and using the results of (i),

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What is the de Broglie wavelength associated with an electron moving with a speed of 5.4×106

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What is the de Broglie wavelength associated with a ball of mass 150 g travelling at 30.0

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An electron, an α-particle, and a proton have the same kinetic energy. Which of these particles has the shortest de Broglie

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A particle is moving three times as fast as an electron. The ratio of the de Broglie wavelength of the particle to that of the electron is 1.813 × 10–4. Calculate the particle’s mass and identify the

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What is the de Broglie wavelength associated with an electron, accelerated through a potential differnece of 100

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Find the(i) maximum frequency,(ii) minimum wavelength of X-rays produced by 30 kV

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The work function of caesium metal is 2.14 eV. When light of frequency 6 ×1014Hz is incident on the metal surface, photoemission of electrons occurs. What is the(i) maximum kinetic energy of the emitted electrons,(ii) Stopping potential,(iii) maximum speed of the emitted

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The photoelectric cut-off voltage in a certain experiment is 1.5 V. What is the maximum kinetic energy of photoelectrons

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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)

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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

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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

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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

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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

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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)

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