When a light of frequency `9 xx 10^(14) Hz` is incident on a metal surface, photoelectrons are emitted with a maximum speed of `8 xx 10^(5) ms^(-1)` . Determine the threshold frequency of the surface.

Light of frequency 7.21 xx 10^14 Hz is incident on a metal surface. Electrons with a maximum speed of 6.0 xx 10^5 ms^-1 are ejected from the surface. What is the threshold frequency for photoemission of electrons?

Light of frequency 7.21 xx 10^(14) Hz is incident on a metal surface. Electrons with a maximum speed of 6.0 xx 10^(5)m//s are ejected from the surface. What is the threshold frequency for photoemission of electrons?

Light of frequency 7.21 xx 10^(14) Hz is incident on a metal surface. Electrons with a maximum speed of 6.0 xx 10^(5)m//s are ejected from the surface. What is the threshold frequency for photoemission of electrons?

Light of frequency 7.21 xx 10^14 Hz is incident on a metal surface. Electrons with a maximum speed of 6.0 xx 10^5 m/s are ejected from the surface. What is the threshold frequency for photoemission of electrons?

Light of frequency 7.21xx10^(14)Hz is incident on a metal surface. Electrons with a maximum speed of 6.0 xx 10^(5) m/s are ejected from the surface. What is the threshold frequency for photoemission of electrons?