Light with an average flux of 20 W/cm2 falls on a non-reflecting surface at normal incidence having surface area 20 cm2. The energy received by the surface during time span of 1 minute is : (1) 12 × 103 J (2) 24 × 103 J (3) 48 × 103 J (4) 10 × 103 J

Correct answer: (2) 24 × 103 J

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Light with an average flux of 20 W/cm^2 falls on a non-reflecting surface at normal incidence having surface area 20 cm^2.

Physics

Last Post by nikhil04 4 years ago

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15/09/2020 6:07 pm

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aditi07

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Light with an average flux of 20 W/cm² falls on a non-reflecting surface at normal incidence having surface area 20 cm². The energy received by the surface during time span of 1 minute is :

(1) 12 × 10³ J

(2) 24 × 10³ J

(3) 48 × 10³ J

(4) 10 × 10³ J

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15/09/2020 6:07 pm

nikhil04

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Correct answer: (2) 24 × 10³ J

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