NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Thermal Properties of Matter
NEET · Physics · Thermal Properties of Matter
Assertion : temperature than red star. Reason : Wein's displacement...
Assertion : temperature than red star.
Reason : Wein's displacement law states that (T \times\left(1 / \lambda_m\right))
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A).
- BBoth (A) and (R) are true and (R) is NOT the correct explanation of ((\mathrm{A})).
- C(A) is true but (R) is false.
- DBoth (A) and (R) are false.
Correct answer
A. Both (A) and (R) are true and (R) is the correct explanation of (A).
Step-by-step solution
Assertion is true a blue star does have a higher temperature than a red star.
By Wein's displacement law-
(\mathrm{T} \times \lambda) (wavelength) (=\mathrm{b}) (Wein's constant)
Therefore, temperature is inversely proportional to wavelength so a star with higher temperature will have a shorter wavelength and will appear blue.
Reason is true and is the correct explanation of assertion.