The metal used for making radiation shield is

While passing through an applied magnetic field,which of the following undergoes the maximum deflection?

The energy required to break one mole of hydrogen-hydrogen bonds in $H_2$ is $436 \ kJ$. What is the longest wavelength of light required to break a single hydrogen-hydrogen bond (in $nm$)?

Which characteristics of electromagnetic radiation can be explained by its wave nature and particle nature,respectively?

The energy of an electromagnetic radiation is $19.875 \times 10^{-13} \ erg$. What is its wave number in $cm^{-1}$? $(h = 6.625 \times 10^{-27} \ erg \ sec, c = 3 \times 10^{10} \ cm \ sec^{-1})$

The wavelength of blue light is $480 \ nm$. What is the frequency of this light?