The photo electric emission requires a threshold frequency

PHYSICS · Subjective · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter

Problem

\nu_0

. For a certain metal

\lambda_1 = 2200 \text{ \AA}

and

\lambda_2 = 1900 \text{ \AA}

produce electrons with a maximum kinetic energy

KE_1

and

KE_2

. If

KE_2 = 2KE_1

, calculate

\nu_0

and corresponding

\lambda_0