The Nobel Prize in Physics in 1930 was awarded to an Indian scientist for his work on the scattering of light. Identify the scientist. MCQ with Answer and Explanation
The Nobel Prize in Physics in 1930 was awarded to an Indian scientist for his work on the scattering of light. Identify the scientist.
A. Satyendra Nath Bose
B. Meghnad Saha
C. C. V. Raman
D. Homi J. Bhabha
Answer: Option C
Solution (By JKSSB Mock Tests)
Sir C. V. Raman was awarded the Nobel Prize in Physics in 1930 for discovering the 'Raman Effect'. The Raman effect involves the inelastic scattering of photons by molecules, resulting in a change in wavelength. This discovery proved that light has particle-like characteristics. National Science Day in India (Feb 28) commemorates this discovery.
Explanation:
For equal distances: average speed = total distance/total time = 2d/(d/v₁ + d/v₂) = 2v₁v₂/(v₁+v₂). This is harmonic mean, not arithmetic. Memory tip: Equal distances ⇒ harmonic mean of speeds; equal times ⇒ arithmetic mean. Frequently tested kinematics concept distinguishing average speed calculation methods.
Explanation:
Gamma emission is the release of high-energy electromagnetic radiation (photons) from a nucleus transitioning from an excited high-energy state to a lower, stable energy state. Gamma rays carry no mass and no electrical charge. Therefore, the emission of a gamma ray does not alter the number of protons (atomic number) or the total number of nucleons (mass number) of the atom.
No comments yet. Be the first to start the discussion!