Match List-I with List-II
| List-I | List-II | ||
|---|---|---|---|
| (Scientist) | (Discoveries) | ||
| (A) | Max Planck | (I) | X-rays |
| (B) | Heinrich Hertz | (II) | Quantum theory |
| (C) | C.V. Raman | (III) | Photoelectric effect |
| (D) | Roentgen | (IV) | Raman effect |
Choose the most appropriate answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A-II, B-III, C-IV, D-I
Each scientist is matched with the discovery he is best known for.
(A) Max Planck — this matches (II) Quantum theory. In 1900 Planck proposed that energy is given out and taken in only in small packets called quanta, which started quantum theory.
(B) Heinrich Hertz — this matches (III) Photoelectric effect. While producing radio waves in 1887, Hertz noticed that ultraviolet light falling on a metal made sparks jump more easily, the first observation of the photoelectric effect; Einstein explained it in 1905.
(C) C.V. Raman — this matches (IV) Raman effect. In 1928 Raman found that light scattered by a substance contains new wavelengths; it won him the Nobel Prize in Physics in 1930.
(D) Roentgen — this matches (I) X-rays. Wilhelm Roentgen discovered X-rays in 1895 and received the first Nobel Prize in Physics in 1901.