Physics Test 21...

Wave optics is based on wave theory of light put forward by Huygen and modified later by

Doppler's effects in sound and light are

The ray of light

The phase difference between two points separated by 0.8 m in a wave of frequency 120 Hz is 90º. Then the velocity of wave will be

Which of the following is not a statement?

When the electron in a hydrogen atom of mass M undergoes transition from an orbit of higher quantum number n₂ to an orbit of lower quantum number n₁, the recoil velocity acquired by the atom is (Rydberg's constant = R, Planck's constant = h)

A 5.0 μ F capacitor is charged to a potential difference of 800 V and discharged through a conductor. The energy given to the conductor during the discharge is

A stone of mass 1 kg tied to a light inextensible string of length L = 10/3 m is whirling in a circular path of radius L in a vertical plane. If the ratio of the maximum tension in the string to the minimum tension in the string is 4 and if g is taken to be 10 m/sec², the speed of the stone at the highest point of the circle is

If six identical cells each having an e.m.f of 6V are connected in parallel, the E.M.F of the combination is

A charged particle of mass m and charge q is released from rest in a uniform electric field E. Neglecting the effect of gravity, kinetic energy of the charged particle after 't' seconds is