Question

If energy (E), velocity (V) and time (T) are chosen as the
fundamental quantities, the dimensional formula of surface
tension will be :
(a) [EV⁻¹T⁻²] (b) [EV⁻²T⁻²]
(c) [E⁻²V⁻¹T⁻³] (d) [EV⁻²T⁻¹]

Answer 1

Explanation:

As the temperature of the black body increases, the wavelength at which the spectral intensity (E

λ

) is maximum decreases.

Reason

The wavelength at which the spectral intensity will be maximum for a black body is proportional to the fourth power of its absolute temperature.

A .

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

B .

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

C .

Assertion is correct but Reason is incorrect

D .

Both Assertion and Reason are incorrect

December 20, 2019

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Viola Joon

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ANSWER

By Wein's Displacement Law

λT=constant of maximum intensity

So as temperature increases wavelength decreases

λ α

T

1

an not

T

4

1