Question

When light of wavelength 400 nm strikes a metal surface photoelectrons are produced having a velocity of 6.24 x 10^5 m/s. What is the value of ? for the metal in joules? The mass of an electron is 9.11 x 10^-31 kg none of the answers are correct 3.85 x 10^-19 J 1.77 x 10^-16 J 4.97 x 10^-19 J

          When light of wavelength 400 nm strikes a metal surface photoelectrons are produced having a velocity of 6.24 x 10^5 m/s. What is the value of ? for the metal in joules? The mass of an electron is 9.11 x 10^-31 kg
none of the answers are correct
3.85 x 10^-19 J
1.77 x 10^-16 J
4.97 x 10^-19 J

When light of wavelength 400 nm strikes a metal surface photoelectrons are produced having a velocity of 6.24 x 10^5 m/s. What is the value of ? for the metal in joules? The mass of an electron is 9.11 x 10^-31 kg
none of the answers are correct
3.85 x 10^-19 J
1.77 x 10^-16 J
4.97 x 10^-19 J

Added by Samuel D.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Amita Prajapat

01/29/2022

Step 1

Given: - Planck's constant (h) = 6.626 x 10^-34 J*s - Speed of light (c) = 3 x 10^8 m/s - Wavelength of light (λ) = 400 nm = 400 x 10^-9 m - Mass of an electron (m) = 9.11 x 10^-31 kg - Velocity of the electron (v) = 6.24 x 10^5 m/s Kinetic Energy (KE) = (1/2) * Show more…

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When light of wavelength 400 nm strikes a metal surface photoelectrons are produced having a velocity of 6.24 x 10^5 m/s. What is the value of ϕ for the metal in joules? The mass of an electron is 9.11 x 10^-31 kg none of the answers are correct 3.85 x 10^-19 J 1.77 x 10^-16 J 4.97 x 10^-19 J