Physics · PYQ NEET UG 2017

The photoelectric threshold wavelength of silver is \( 3250 \times 10^{-10}\text{ m} \). The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength \( 2536 \times 10^{-10}\text{ m} \) is: (Given: \( h = 4.14 \times 10^{-15}\text{ eVs} \) and \( c = 3 \times 10^8\text{ ms}^{-1} \))

1. A
   \( \approx 6 \times 10^5\text{ ms}^{-1} \)
2. B
   \( \approx 0.6 \times 10^6\text{ ms}^{-1} \)
3. C
   \( \approx 61 \times 10^3\text{ ms}^{-1} \)
4. D
   \( \approx 0.3 \times 10^6\text{ ms}^{-1} \)