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Photoelectric Effect and Wave–Particle Duality — JEE Main & Advanced Physics PYQs

63 previous year questions from Photoelectric Effect and Wave–Particle Duality with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

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1

Determine the net energy absorbed by an atom during a process in which it absorbs a photon of wavelength 500 nm and subsequently emits another photon of wavelength 700 nm .

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Compute the number of photons emitted per second by a 10 W sodium vapour lamp. Assume that 60 % of the consumed energy is converted into light. The wavelength of sodium light is 59

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Assuming the sun is directly overhead, the surface of the earth receives sunlight at 1.4 imes 10^3 W m ⁻² . Treat the light as monochromatic with an average wavelength of 500 nm ,

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Assuming the sun is directly overhead, the surface of the earth receives sunlight at 1.4 10^3 W m ⁻² . Treat the light as monochromatic with an average wavelength of 500 nm , and a

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Assuming the sun is directly overhead, the surface of the earth receives sunlight at 1.4 10^3 W m ⁻² . Treat the light as monochromatic with an average wavelength of 500 nm , and a

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Determine the momentum of a light photon that has a wavelength of 500 nm .

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Visible light encompasses wavelengths ranging from 400 nm to 780 nm . Determine the energy range of the photons of visible light.

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A beam of white light strikes a plane surface normally. The surface absorbs 70 % of the light while reflecting the remainder. Determine the force exerted on the surface by the beam

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A small, totally reflecting plane mirror is positioned horizontally to face a parallel beam of light, as shown in the figure. The mirror has a mass of 20 g . Assuming no absorption

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A 100 W light bulb is positioned at the centre of a spherical chamber having a radius of 20 cm . Assuming that 60 % of the energy supplied to the bulb is converted into light and t

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A sphere of radius 1.00 cm is positioned in the path of a parallel beam of light with a large aperture. The light has an intensity of 0.50 W cm ⁻² . Assuming the sphere completely

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Why is it not possible for a photon to be completely absorbed by a free electron?

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A sphere of radius 1.00 cm is positioned in the path of a parallel beam of light of large aperture. The intensity of the light is 0.50 W cm ⁻² . If the sphere is not perfectly abso

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Determine the maximum kinetic energy of the photoelectrons emitted when light of wavelength 350 nm strikes a cesium surface. The work function of cesium is 1.9 eV .

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Placed 1 m apart, two initially neutral particles undergo a process where charge is transferred from one particle to the other. Assuming the lost electric potential energy is entir

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A metal has a work function of 2.5 10⁻¹⁹ J . Determine the threshold frequency for photoelectric emission.

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A metal has a work function of 2.5 10⁻¹⁹ J . When the metal is illuminated by a light beam of frequency 6.0 10¹⁴ Hz , what is the stopping potential?

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A photoelectric material has a work function of 4.0 eV . Determine its threshold wavelength.

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For a photoelectric material with a work function of 4.0 eV , calculate the wavelength of incident light that results in a stopping potential of 2.5 V .

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A metal plate is illuminated by a monochromatic beam of light with a wavelength of 400 nm , and a negative potential of 1.1 V is required to halt the photocurrent. Determine the th

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In a photoelectric effect experiment, the stopping potential is measured for monochromatic light beams of varying wavelengths. The collected data is as follows: wavelength (nm) 350

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A parallel beam of monochromatic light having a wavelength of 663 nm is incident on a totally reflecting plane mirror. The angle of incidence is 60^ , and 1.0 10¹⁹ photons strike t

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In a photoelectric effect experiment, the stopping potential is measured for monochromatic light beams of varying wavelengths. Find the threshold wavelength from the experimental d

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For a monochromatic beam, the associated electric field becomes zero 1.2 10¹⁵ times per second. Determine the maximum kinetic energy of the photoelectrons emitted when this light i

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A light wave has an associated electric field given by E = E₀ ! [(1.57 10^7 m ⁻¹)(x - ct) ] . Determine the stopping potential if this light is utilized in a photoelectric effect e

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The electric field associated with a light wave at a point is given by E = (100 Vm ⁻¹) ! [(3.0 10¹⁵ s ⁻¹) t ] ! [(6.0 10¹⁵ s ⁻¹) t ] . When this light is incident on a metal surfac

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Determine the maximum magnitude of the linear momentum of a photoelectron emitted when light of wavelength 400 nm is incident on a metal having a work function of 2.5 eV .

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The figure displays the plot of the stopping potential versus the frequency of the light used in an experiment on the photoelectric effect. Determine the ratio h/e .

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In a photoelectric effect experiment, the stopping potential is measured for monochromatic light beams of varying wavelengths. Determine the work function of the emitter from the e

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The plot of the stopping potential versus the frequency of the light used in an experiment on the photoelectric effect is a straight line. The stopping potential is 0 V at a freque

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A photographic film is coated with a layer of silver bromide. When light strikes this film, the silver bromide molecules dissociate, and the film records the light. A minimum of 0.

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During an experiment on the photoelectric effect, light of wavelength 400 nm illuminates a cesium plate at a rate of 5.0 W . The potential of the collector plate is kept sufficient

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In a photoelectric effect experiment, the emitter and collector plates are separated by 10 cm and connected via an ammeter without any cell (as shown in the figure). A magnetic fie

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A silver ball of radius 4.8 cm is suspended by a thread within a vacuum chamber. Ultraviolet light having a wavelength of 200 nm strikes the ball for a duration such that a total l

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For the setup illustrated in the figure, y = 1.0 mm , d = 0.24 mm , and D = 1.2 m . The work function of the material of the emitter is 2.2 eV . Determine the stopping potential V

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A monochromatic light source with an intensity of 5 mW emits 8 10¹⁵ photons per second. This light ejects photoelectrons from a metal surface. The stopping potential for this arran

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During a photoelectric experiment, the collector plate is maintained at 2.0 V relative to a copper emitter plate ( = 4.5 eV ). A monochromatic light source of wavelength 200 nm ill

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A small piece of cesium metal ( = 1.9 eV ) is positioned 20 cm away from a large metal plate, which has a charge density of 1.0 10⁻⁹ C m ⁻² on the surface facing the cesium. Monoch

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A small piece of cesium metal ( = 1.9 eV ) is positioned 20 cm away from a large metal plate. The surface of the plate facing the cesium piece carries a charge density of 1.0 10⁻⁹

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A horizontal cesium plate ( = 1.9 eV ) travels vertically downward with a steady speed v inside a room filled with radiation of wavelength 250 nm and greater. Determine the minimum

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A metal plate with a work function of 2.2 eV is illuminated by a light beam having a wavelength of 400 nm . A particular electron absorbs a photon and undergoes two collisions befo

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A metal plate with a work function of 2.2 eV is illuminated by a light beam having a wavelength of 400 nm . A particular electron absorbs a photon. Assuming that 10 % of the extra

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The dimensions of the Planck constant are identical to those of

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Suppose p and E represent the linear momentum and energy of a photon, respectively. If the wavelength is reduced,

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The equation E = pc holds true

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Suppose n_r and n_b represent the number of photons emitted by a red bulb and a blue bulb respectively, both having equal power, during a given time interval. Which of the followin

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When light of wavelength is incident on a metal with a work function of hc/ ₀ , the photoelectric effect will occur only if

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A metal has a work function of h ₀ . If light of frequency is incident upon this metal, the photoelectric effect will occur only if

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For two photons, which of the following is true?

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During an experiment on the photoelectric effect, no photocurrent is detected when the stopping potential is applied. This indicates that

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When the frequency of incident light in a photoelectric experiment is doubled, the stopping potential will

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A point source of light is utilized in a photoelectric effect setup. If the source is moved farther from the emitting metal, the stopping potential

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A point source induces the photoelectric effect on a small metal plate. Which of the curves shown could depict the saturation photocurrent as a function of the distance between the

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Suppose the frequency and intensity of a light source are both doubled. Evaluate the two statements below. (A) The saturation photocurrent remains nearly unchanged. (B) The maximum

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When nonmonochromatic light is utilized in a photoelectric effect experiment, the stopping potential

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An electron and a proton are accelerated through an identical potential difference. Let _e and _p represent the de Broglie wavelengths of the electron and the proton, respectively.

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Upon increasing the intensity of a light source,

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A photon of energy h is absorbed by a free electron of a metal with a work function < h .

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In a photoelectric effect experiment, the photocurrent increases if

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In an experiment on the photoelectric effect, if the wavelength of the incident light is doubled,

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During a photoelectric effect experiment, the collector plate is maintained vertically above the emitter plate. A light source is turned on, and a saturation photocurrent is measur

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The quantum nature of light is supported by the photoelectric effect because

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For which of the following scenarios will the heavier of two particles have a shorter de Broglie wavelength? The two particles

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