Calculate the maximum angular resolution of a lens of diameter 25 mm at a wavelength of 1.2 um MtI

O (1) The critical angle for Total Internal Reflection for a certain air/glass interface is measured to be 38.6°. Calculate the refractive index of the glass
(m) Identify the species X in the equation below: 231 92
(n) Calculate the ionisation potential of ground state hydrogen in units of eV.
o) A certain radioactive sample has a half-life of 3.83 days. Calculate its decay constant.