In case of photoelectric effect experiment explain the following facts giving reasons:
The wave theory of light could not explain the existence of the threshold frequency.

Huygen's wave theory of light could not explain

In case of photoelectric effect experiment explain the following facts giving reasons: The photoelectric current increases with increase of intensity of incident light.

Explain the following statement giving reason- Bell metal is not a metal.

Explain the following case giving appropriate reason : The pi -complexes are known for the transition metals only.

Given instructions same as in chapter 1. Assertion: For photoelectric effect to take place, the frequency of incident of incident radiations should be more than threshold frequency of a given metal Reason: 1/2 mv^2=h(v-v_0) .