Physics · PYQ NEET UG 2016(1)

An electron of mass \( m \) and a photon have same energy \( E \). The ratio of de-Broglie wavelengths associated with them is (\( c \) being velocity of light)

1. A
   \( \frac{1}{c} (\frac{E}{2m})^{\frac{1}{2}} \)
2. B
   \( \frac{1}{c} (\frac{2m}{E})^{\frac{1}{2}} \)
3. C
   \( c(2mE)^{\frac{1}{2}} \)
4. D
   \( (\frac{2m}{E})^{\frac{1}{2}} \)