Question

solve my question please only if you know the answer​

Answer 1

Answer:

Ello❤

Appy frndship day ♥

It can be observed that the energy of the incident radiation is less than the work function of the metal. Hence, no photoelectric emission will take place. Light of frequency 7.21 × 1014 Hz is incident on a metal surface. Electrons with a maximum speed of 6.0 × 105 m/s are ejected from the surface.

Answer 2

❤Hola beta ❤

hv = 1/2 mv^2 + fhai not

= 2.6 + 4.2

= 6.8 V

.•♫•thanks pglu •♫•.