Question

A 60 W light bulb with luminous flux 80pi Im is suspended 2*2^1/2 m over a table. If the illumination on the table directly under the bulb needs to be doubled
then the hight of the bulb over the table is
2 m
0.75m
0.5m​

Answer 1

Answer:

0.5m will be the answer

Please mark me brain list

Answer 2

Answer:

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