Excited atoms return to their ground state in_______________?

Related Mcqs:

The electric P.E of an electron in an orbit at a distance rn from the positive charge_____________?

A. Ke2/rn B. Ke2/rn2 C. ÀKe2/rn D. ÀKe2/rn2...

The penetrating power of X-rays depends on their______________?

A. applied voltage B. frequency C. source D. all of the above...

In an electronic transition atom cannot emit______________?

A. γ-rays B. Infra red radiation C. Visible light D. Ultraviolet rays...

In He-Ne laser the lasing action is produced by_______________?

A. Ne only B. He-Ne both C. Electrons of He D. Electrons Ne...

The velocity of laser light is___________________?

A. Less than ordinary light B. More than ordinary light C. Equal to ordinary light D. Different for different colours or frequency...