Kelvi

Light with an average flux of $20$ W/cm $^2$ falls on a non-reflecting surface at normal incidence having surface area $20$ cm $^2.$ The energy received by the surface during a time span of 1 minute is:

easy

Thermal Properties of Matter

2020

physics

$12 \times 10^3$ J

$24 \times 10^3$ J

$48 \times 10^3$

Explanation

To solve this problem, we need to calculate the total energy received by the surface. $\\$ Given: $\\$ • Average flux (power per unit area) $= 20 \,$ W/cm $^2 \\$ • Surface area $= 20 \,$

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Light with an average flux of 20 20 20 W/cm2^2 2 falls on a non-reflecting surface at normal incidence having surface area 20 20 20 cm2.^2. 2. The energy received by the surface during a time span of 1 minute is:

Explanation

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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 $^2.$ The energy received by the surface during a time span of 1 minute is: