Question

The photoelectric threshold wavelength of silver is 3250 × 10–10 m. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536 × 10–10 m is
(Given h = 4.14 × 10–15 eVs and c = 3 × 108 ms–1)

• A. ≃ 6 × 105 ms–1
• B. ≃ 0.6 × 106 ms–1
• C. ≃ 61 × 103 ms–1
• D. ≃ 0.3 × 106 ms–1

Answer 1

Answer: (A), (B)

≃ 6 × 105 ms–1

Answer 2

The correct options are (A): ≃ 6 × 105 ms–1 and (B): ≃ 0.6 × 106 ms–1.