Physics · Dual nature of radiation, Photoelectric effect, Hertz and Lenard's observations
The difference in maximum kinetic energy of photoelectrons from the and from B
The difference in maximum kinetic energy of photoelectrons from the \( A \) and from B
- A. increases with increases in \( E \)
- B. decreases with decreases in \( E \)
- C. first increases than decrease with increase in \( E \)
- D. remain constant
Step-by-step solution
The maximum kinetic energy of photoelectrons is K_max = hf - φ, where φ is the work function. For two materials A and B, the difference K_max(A) - K_max(B) = (hf - φ_A) - (hf - φ_B) = φ_B - φ_A, which is independent of the incident photon energy E (or frequency f). Therefore, the difference remains constant as E changes.
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