Which of the following is not the unit of length :

-- The speed of light in a medium is 1.5 × 10⁸ m/s. The critical angle for this medium with respect

The frequency of an electromagnetic wave in free space is 2 MHz. When it passes through a medium of

-- In a p-type semiconductor, the majority charge carriers are

-- The energy of an electron in nth orbit of hydrogen atom is E_n = -13.6/n² eV. The energy required

-- Two magnets of magnetic moments M and 2M are placed in a vibration magnetometer, with like poles