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QNEET-2020-Ph-722: NEET 2020 Physics - Class 12 NEET-2020-Ph-722 Solution: Light with an average flux of $20\ {W/cm}^2$ falls on a…

Light with an average flux of

20\ \text{W/cm}^2

falls on a non-reflecting surface at normal incidence having surface area

20\ \text{cm}^2

. The energy received by the surface during time span of 1 minute is:

12 \times 10^3\ \text{J}

24 \times 10^3\ \text{J}

48 \times 10^3\ \text{J}

10 \times 10^3\ \text{J}

Step-by-Step Verified Solution

Energy = intensity _ time _ area = 20 _ 60 _ 20 E = 24 _ 10 3 J