Step-by-Step Solution:1. Write down the equation: The mass-energy equivalence relation proposed by Einstein is given by the formula: \( E = mc^2 \)2. Define each symbol: -
1.SELECTIVE REFLECTION Most objects "reflect" rather than emit light. The spring model of the atom works well in explaining reflection. Radiations that match the resonant frequencies of the atoms are absorbed. Frequencies of the radiations on either side of the resonant frequencies are “reflected...