Question

If a metal is irradiated with light of frequency
3 x 10 sec !, electron is emitted with kinetic
energy of 6.625 x 10-15 J. The threshold
frequency of the metal is
1) 2 x 1019 sec 2) 1.25 x 1019 sec1
216625 x 1035 sec-14) 6.625 x 1019 sec-1​

Answer 1

Explanation:

Hence, angstrom, micron, and parsec are all units of length, only steradian is not a unit of length.