NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Wave Optics
NEET · Physics · Wave Optics
Given below are two statements: one is labelled as Assertion (A)...
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): The formation of perfectly dark fringes in Young's double slit experiment does not violate the law of conservation of energy.
Reason (R): The energy that is 'missing' at the dark fringes is exactly compensated by an equivalent increase in energy at the bright fringes.
In the light of the above statements, choose the most appropriate answer from the options given below:
Assertion (A): The formation of perfectly dark fringes in Young's double slit experiment does not violate the law of conservation of energy.
Reason (R): The energy that is 'missing' at the dark fringes is exactly compensated by an equivalent increase in energy at the bright fringes.
In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A)
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
- C(A) is true but (R) is false
- D(A) is false but (R) is true
Correct answer
A. Both (A) and (R) are true and (R) is the correct explanation of (A)
Step-by-step solution
Assertion (A) is true because the phenomenon of interference is strictly consistent with the principle of conservation of energy.
Reason (R) is true and correctly explains Assertion (A). In an interference pattern, energy is neither created nor destroyed. It is merely redistributed spatially. The energy that is absent at the regions of destructive interference (dark fringes) is shifted to the regions of constructive interference (bright fringes), keeping the total energy of the system constant.
Answer: Both (A) and (R) are true and (R) is the correct explanation of (A)
Reason (R) is true and correctly explains Assertion (A). In an interference pattern, energy is neither created nor destroyed. It is merely redistributed spatially. The energy that is absent at the regions of destructive interference (dark fringes) is shifted to the regions of constructive interference (bright fringes), keeping the total energy of the system constant.
Answer: Both (A) and (R) are true and (R) is the correct explanation of (A)