1.

what is the power of the lamp if its lumious efficiency is 2 watt and its lumious intensity is 42 candela​

Answer»

Answer:

I THINK

Explanation:

Luminous FLUX=Luminous intensity∗SOLID angle

Total solid angle = 4 π

So, Luminous flux = 700 x 4 π

Luminous flux = Luminous EFFICIENCY x POWER

=> 700 x 4 π = 8.8 x power

=> Power of lamp = 1000 W

Answer. 10 w



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