Practicing Success
Practicing Success
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Photons absorbed in matter are converted to heat. A source emitting n photon/sec of frequency \(\nu\) is used to convert 1 Kg of ice at 0°C. Then, the time T taken for the conversion : |
decreases with increasing n, with \(\nu\) fixed decreases with n fixed, \(\nu\) fixed remains constant with n fixed and \(\nu\) changing such that n\(\nu\) = constant All the above |
All the above |
Energy spent to convert ice into water = m L = (1000 g) x (80 cal/g) = 80000 cal Energy of photons used = n T x E = n T x h \(\nu\) n T h \(\nu\) = m L or T = m L /nh \(\nu\) |
