Two black spheres 'P' and 'Q' have radii in the ratio $3: 2$. The wavelengths of maximum intensity radiation…
Two black spheres 'P' and 'Q' have radii in the ratio $3: 2$. The wavelengths of
maximum intensity radiation are in the ratio $3: 4$ respectively. The ratio of radiated
power by 'P' to 'Q' is
$\frac{74}{9}$
$\frac{64}{9}$
$\frac{16}{9}$
$\frac{25}{9}$
Solution
The ratio of radiated power is based on the surface area and temperature of the spheres. Since the radii are given in a ratio and the wavelengths of maximum intensity follow Wien's displacement law, the power radiated by the spheres can be calculated. The correct answer is:(2)
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