The dimensions of σb4 (σ =Stefan's constant and b = Wein's constant) are:
Correct answer: B. [ML4T-3]
- A. [M0L0T0]
- B. [ML4T-3]
- C. [ML-2T]
- D. [ML6T-3]
Explanation
The following is the solution: b=λmT, where λm is the peak wavelength of the black body radiation and T is the surface temperature of the black body.
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About Measurements
Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
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