Assertion : Bohr had to postulate that the electrons in stationar… - Vidyadip

MCQ

Assertion : Bohr had to postulate that the electrons in stationary orbits around the nucleus do not radiate.
Reason : According to classical physics all moving electrons radiate

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
✓
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.

✓

Answer

Correct option: B.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

b
According to classical physics all moving electrons around the nucleus will radiate because an accelerated electron in electric field will radiate e.m. wave. So Reason is correct. But Reason does not explain the Assertion. Bohr's postulates that the electron in stationary orbits do not radiate. His postulate was based not out of compulsion but on the quantum theory. So Assertion is also correct but Reason does not explain Assertion

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