← CBSE Class 12 PYQ

Dual Nature of Radiation and Matter

CBSE Class 12 · Physics · 33 past questions

15 of 33 · show all

Q2 2026

A proton and an alpha particle have equal momentum. The ratio of their kinetic energies (E_p/E_a) and de…
Q4 2026

A particle of mass M at rest splits up into two particles of masses $m_1$ and $m_2$ having non-zero…
Q7 2026

A researcher performs an experiment on photo-electric effect using two metals A and B with unknown work… (with a figure)
Q10 2026

Find ratio ($\lambda_a/\lambda_p$) of the de Broglie wavelength $\lambda_a$ and $\lambda_p$ associated…
Q12 2025

A beam of red light and a beam of blue light have equal intensities. Which of the following statements is…
Q13 2025

Questions number 13 to 16 are Assertion (A) and Reason (R) type questions. Two statements are given — one…
Q14 2025

Atomic spectral emission lines of hydrogen atom are incident on a zinc surface. The lines which can emit…
Q15 2025

A light of wavelength 400 nm is incident on metal surface whose work function is $3.0 \times 10^{-19}$ J.…
Q20 2024

The minimum intensity of white light that our eyes can perceive is about $0.1\ \text{nWm}^{-2}$. Calculate…
Q21 2024

Two beams, A and B whose photon energies are 3.3 eV and 11.3 eV respectively, illuminate a metallic surface…
Q24 2024

Consider a neutron (mass $m$) of kinetic energy $E$ and a photon of the same energy. Let $\lambda_n$ and…
Q27 2024

de Broglie wavelength λ as a function of $\frac{1}{\sqrt{K}}$, for two particles of masses m₁ and m₂ are… (with a figure)
Q29 2023

Figure shows the variation of photoelectric current measured in a photo cell circuit as a function of the… (with a figure)
Q31 2023

Calculate the wavelength of de Broglie waves associated with a proton having…
Q33 2022

Name the spectral series for a hydrogen atom which lies in the visible region. Find the ratio of the maximum…