Planck's distribution law is valid for __________ bodies.
A. Black
B. White
C. Coloured
D. All of the above
Answer: Option C
A. Black
B. White
C. Coloured
D. All of the above
Answer: Option C
A. 3.06 × 105
B. 6.12 × 105
C. 7.24 × 105
D. 9.08 × 105
Fqra cold viscous feed, backward feed gives __________ than forward feed.
A. A higher capacity
B. A lower capacity
C. Lower economy
D. None of these
A. Twice
B. Four times
C. Square root of
D. Square of
This law is valid for both coloured and black and white bodies so option d is correct