A ray of light is incident on a transparent medium at polarising angle. What is the angle between the reflected ray and the refracted ray?
Polarising angle = 90o
How does the focal length of a convex lens change with increase in wavelength of the incident light?
With reference to the photoelectric effect, what is meant by the threshold wavelength?
Half life of a certain radioactive element is 3.465 days. Find its disintegration constant.
Binding energy per nucleon for helium nucleus is 7.0 MeV. Find the value of mass defect for helium nucleus.