Exams › JEE Main › Physics

Statement 1: Davisson-Germer experiment established the wave nature of electrons. Statement 2: If electrons have wave nature, they can interfere and show diffraction.

1. Statement -1 is true, Statement -2 is true; Statement -2 is the correct explanation of Statement -1.
2. Statement -1 is true, Statement -2 is true; Statement -2 is not the correct explanation of Statement -1.
3. Statement -1 is false, Statement -2 is true.
4. Statement -1 is true, Statement -2 is false.

Correct answer: Statement -1 is true, Statement -2 is true; Statement -2 is the correct explanation of Statement -1.

Solution

The Davisson-Germer experiment demonstrated that electrons exhibit wave-like behavior, which is evidenced by their ability to interfere and diffract, thus confirming the wave nature of matter. Therefore, Statement 2 logically explains Statement 1.

Related JEE Main Physics questions

• A star is sending out light of wavelength 5000 Å and is moving toward the Earth with a speed of 1.50 × 10⁶ m/s. What is the shift in the wavelength of the light observed on Earth?
• A beam of radiation carrying energy E is incident perpendicularly on a perfectly reflecting surface. What momentum is imparted to the surface? (C = speed of light)
• Two identical photocathodes are illuminated by light of frequencies f1 and f2. If the emitted photoelectrons have speeds v1 and v2 respectively, then
• An X-ray tube is run with a potential difference of 15 kV. What is the maximum possible speed of the electrons that hit the target?
• In a photoelectric setup, monochromatic light of wavelength λ ejects electrons, and the maximum speed of the emitted electrons is v. If the incident wavelength is changed to 5λ/4, the speed of the emitted electrons will be
• A sodium street lamp rated at 200 W produces yellow radiation of wavelength 0.6 μm. If only 25% of the electrical power is converted into light, how many yellow photons are emitted each second?

⚔️ Practice JEE Main Physics free + battle 1v1 →