The de Broglie wavelength of a photon is twice the de Broglie wavelength of an electron. The speed of the electron is . Then

Relativistic corrections become necessary when the expression for the kinetic energy becomes comparable with mc², where m is the mass of the particle. At what de Broglie wavelength will relativistic corrections become important for an electron?

Two particles A₁ and A₂ of masses m₁, m₂ (m₁ > m₂) have the same de Broglie wavelength. Then

Photons absorbed in matter are converted to heat. A source emitting n photon/sec of frequency v is used to convert 1kg of ice at 0°C to water at 0°C. Then, the time T taken for the conversion

A particle moves in a closed orbit around the origin, due to a force which is directed towards the origin. The de Broglie wavelength of the particle varies cyclically between two values λ₁, λ₂ with λ₁ > λ₂. Which of the following statement are true?