Which phenomenon occurs when light bends around the edges of an obstacle or aperture?

What is the half-life of a radioactive substance?

What is the SI unit of force?

Which type of mirror is used in reflecting telescopes?

Which principle states that no two electrons in an atom can have the same set of four quantum numbers?

Which device converts electrical energy into mechanical energy?

What is the function of an optical fibre?

Which type of spectrum consists of specific discrete wavelengths emitted by excited atoms?

Which experiment proved that the atom has a small dense positively charged nucleus?

Which law states that the induced EMF in a conductor is proportional to the rate of change of magnetic flux?

Which device converts mechanical energy into electrical energy?