'Production of X-rays and emission of electron in photoelectric effect are two opposite phenomena'' Justify the statement.

Production of X-rays and emissions of electron in photoelectric effect are two opposite phenomena." Justify the statement.

Photoelectric effect is the opposite phenomenon of X-ray emission'. Explain.

Find the correct statements about photoelectric effect.

A metal surface does not emit any electron if the energy of incident radiation is less than the photoelectric work function of the metal - justify the statement mathematically.

All the collisions among reactant molecules are not effective to bring in a change " - Justify the statement .

When light incident on a metal has energy less than the work function of the metal, then no electron is emiited from the surface of the metal. Mathematically justify this statement.

Statement I: The stopping potential becomes double when the frequency of the incident radiation is doubled Statement II: Work function of the metal and the threshold frequency of photoelectric effect are proportional to each other.

"The properties of an element depend on the electronic configuration of the outermost orbit of its atom"-justify the statement with reasons.

Discuss the following events as mentioned in the evolutionary theory of Darwin: Prodigality of production Adaptation is the change of shape, physiological functions and behaviour of organism'-Justify the statement with the help of any two examples.

Discuss the following events as mentioned in the evolutionary theory of Darwin: Prodigality of production Adaptation is the change of shape, physiological functions and behaviour of organism'-Justify the statement with the help of any two examples.