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debroglie duel nature of light questions with solutions
Practice Photoelectric effect and dual nature of matter for JEE Main, JEE Advanced, NEET, and Classes 11–12. Attempt each question, then open it for the full solution.
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- NumericmediumPhotoelectric effect and dual nature of matter
An electron and a proton both start from rest and are accelerated separately. The electron is accelerated through 1836 V. The proton is to be accelerated through such a potential that its de Broglie wavelength is exactly equal to that of the electron. Take mₚ = 1836mₑ. If the proton accelerating potential is N V, find N.
JEE MainsNEETJEE Advanced
Open question & full solution → - MCQmediumPhotoelectric effect and dual nature of matter
The kinetic energy of an electron, α-particle and a proton are given as 4 K, 2 K and K respectively. The de-Broglie wavelength associated with electron (λₑ), α-particle (λₐ) and the proton (λₚ) are as follows:
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JEE Mains6 April 2023Shift 1Morning Shift
Open question & full solution → - MCQeasyPhotoelectric effect and dual nature of matter
An electron moves with speed v in free space and has de Broglie wavelength λ₀. On entering a medium, its speed decreases by 20%, while its mass is treated as unchanged and the motion remains non-relativistic. If its de Broglie wavelength in the medium is αλ₀, what is α?
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JEE Mains 2026 5 April Evening Shift
Open question & full solution → - MCQmediumPhotoelectric effect and dual nature of matter
A proton and an α-particle are accelerated from rest through potentials 2 V and 4 V respectively. The ratio of their de Broglie wavelengths λₚ:λₐ is:
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JEE Mains12 April 2023Shift 1Morning Shift
Open question & full solution → - MCQeasyPhotoelectric effect and dual nature of matter
The ratio of de-Broglie wavelength of an α-particle and a proton accelerated from rest by the same potential is 1/√m. The value of m is:
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JEE Mains29 January 2023Shift 2Evening Shift
Open question & full solution → - NumericmediumPhotoelectric effect and dual nature of matter
Electrons accelerated from rest through 900 V produce a first-order diffraction maximum from one crystal at a certain Bragg angle. A second crystal has interplanar spacing 1.5 times that of the first crystal. What accelerating voltage should be used with the second crystal so that the first-order diffraction maximum occurs at the same Bragg angle? If the required voltage is N V, find N.
JEE MainsNEETJEE Advanced
Open question & full solution → - MCQeasyPhotoelectric effect and dual nature of matter
An α-particle, a proton and an electron have the same kinetic energy. Which one of the following is correct in case of their De-Broglie wavelength:
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JEE Mains24 January 2023Shift 2Evening Shift
Open question & full solution → - Multi-correctmediumPhotoelectric effect and dual nature of matter
Two non-relativistic particles are experimentally found to have exactly the same de Broglie wavelength. Which statements must be correct?
Select all that apply
JEE MainsNEETJEE Advanced
Open question & full solution → - NumericmediumPhotoelectric effect and dual nature of matter
A particle having electric charge 3 × 10⁻¹⁹ C and mass 6 × 10⁻²⁷ kg is accelerated by applying an electric potential of 1.21 V. Wavelength of the matter wave associated with the particle is α × 10⁻¹² m. The value of α is _________.
(Take Planck’s constant = 6.6 × 10⁻³⁴ J.s)
JEE Mains 202621 January Evening Shift
Open question & full solution → - MCQmediumPhotoelectric effect and dual nature of matter
A proton and a deuteron, each carrying charge +e, start from rest and are accelerated through the same potential difference. Take the deuteron mass to be twice the proton mass. What is the ratio of their de Broglie wavelengths λₚ:λ(d)?
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JEE MainsNEETJEE Advanced
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