Dual Nature of Radiation and Matter Previous Year Questions — NEET Physics

2 past-year Dual Nature of Radiation and Matter questions from NEET (Physics).

Q2 (2024)

<div style="overflow-x: auto; margin: 1rem 0;"><table style="width: 100%; border-collapse: collapse; text-align: left; font-size: 14px;"><thead><tr><th style="border: 1px solid #888; padding: 8px;" colspan="2">List I</th><th style="border: 1px solid #888; padding: 8px;" colspan="2">List II</th></tr></thead><tbody><tr><td style="border: 1px solid #888; padding: 8px;">A.</td><td style="border: 1px solid #888; padding: 8px;">$E = hv$</td><td style="border: 1px solid #888; padding: 8px;">I.</td><td style="border: 1px solid #888; padding: 8px;">de Broglie wavelength</td></tr><tr><td style="border: 1px solid #888; padding: 8px;">B.</td><td style="border: 1px solid #888; padding: 8px;">Diffraction and Interference</td><td style="border: 1px solid #888; padding: 8px;">II.</td><td style="border: 1px solid #888; padding: 8px;">Particle nature of light</td></tr><tr><td style="border: 1px solid #888; padding: 8px;">C.</td><td style="border: 1px solid #888; padding: 8px;">$\lambda = h/p$</td><td style="border: 1px solid #888; padding: 8px;">III.</td><td style="border: 1px solid #888; padding: 8px;">Wave nature of light</td></tr><tr><td style="border: 1px solid #888; padding: 8px;">D.</td><td style="border: 1px solid #888; padding: 8px;">Compton effect</td><td style="border: 1px solid #888; padding: 8px;">IV.</td><td style="border: 1px solid #888; padding: 8px;">Energy of photon</td></tr></tbody></table></div> Choose the correct answer from the options given below:
  1. \text{(1) A-IV, B-III, C-I, D-II}
  2. \text{(2) A-I, B-IV, C-III, D-II}
  3. \text{(3) A-IV, B-I, C-II, D-III}
  4. \text{(4) A-IV, B-III, C-II, D-I}
### Related Formula $E = h\nu$ $$\lambda = \frac{h}{p}$$ ### Core Logic A. $E = h\nu$ is energy of photon (IV) B. Diffraction and interference confirm wave nature of light (III) C. $\lambda = \frac{h}{p}$ is de Broglie wavelength of particle (I) D. Compton effect confirms particle nature of light (II) ### Pattern Recognition Match properties of light and matter with corresponding theoretical principles. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 12 Physics: Dual Nature of Radiation and Matter

Q42 (2024)

For a metal of work function 6.6 eV, which of the following wavelengths of incident radiation does not give rise to the photoelectric effect? (Take Planck's constant as $6.6 \times 10^{-34}$ J s)
  1. 200 nm
  2. 150 nm
  3. 100 nm
  4. 50 nm
### Related Formula $$\lambda_0 = \frac{hc}{W_0}$$ ### Core Logic For photoelectric emission, $\lambda \le \lambda_0$. $$\lambda_0 = \frac{6.6 \times 10^{-34} \times 3 \times 10^8}{6.6 \times 1.6 \times 10^{-19}} = \frac{3 \times 10^{-7}}{1.6} = 187.5 \text{ nm}$$ Wavelengths greater than $187.5\text{ nm}$ will not cause photoelectric emission. Therefore, $200\text{ nm}$ will not produce photoelectric effect. ### Pattern Recognition Photoelectric emission occurs only for wavelengths less than or equal to threshold wavelength. ### Evaluation Rubric / Model Answer null ### Chapter Mix Class 12 Physics: Dual Nature of Radiation and Matter
Rankbit System
JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)

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