Q: What is the average intensity of illumination on a surface if it is inclined at an angle of 30° to the light rays from a lamp of MSCP 100, placed 5 m away? 5m दूर रखे 100 MSCP के लैंप से निकलने वाली प्रकाश किरणों से, 30º के कोण पर आनत एक पृष्ठ पर प्रदीप्ति की औसत तीव्रता कितनी है?
A.
2 lux
B.
10 lux
C.
4 lux
D.
20 lux
Correct Answer:
Option A -
Explanations:
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