NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Electromagnetic Waves
NEET · Physics · Electromagnetic Waves
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 wavelength of red light is greater than that of blue light.
Reason (R): In vacuum, red light travels faster than blue light.
In the light of the above statements, choose the most appropriate answer from the options given below:
Assertion (A): The wavelength of red light is greater than that of blue light.
Reason (R): In vacuum, red light travels faster than blue light.
In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
C. (A) is correct but (R) is not correct
Step-by-step solution
In the visible spectrum (VIBGYOR), wavelength increases from violet to red. Therefore, the wavelength of red light is indeed greater than that of blue light. Hence, Assertion (A) is correct.
In a vacuum, all electromagnetic waves (including red and blue light) travel at the same constant speed, . The speed of light in vacuum is independent of its wavelength. Hence, Reason (R) is incorrect.
Therefore, (A) is correct but (R) is not correct.
Answer: (A) is correct but (R) is not correct
In a vacuum, all electromagnetic waves (including red and blue light) travel at the same constant speed, . The speed of light in vacuum is independent of its wavelength. Hence, Reason (R) is incorrect.
Therefore, (A) is correct but (R) is not correct.
Answer: (A) is correct but (R) is not correct