Monochromatic light of wavelength $$\lambda=4770 \mathop A\limits^o $$ is incident separately on the surfaces of four different metals A, B, C and D. The work functions of A, B, C and D are $$4.2 \mathrm{~eV}, 3.7 \mathrm{~eV}, 3.2 \mathrm{~eV}$$ and $$2.3 \mathrm{~eV}$$, respectively. The metal / metals from which electrons will be emitted is / are

Electric field component of an EM radiation varies with time as E = a (cos$$\omega$$₀t + sin$$\omega$$t cos$$\omega$$₀t), where a is a constant and $$\omega$$ = 10¹⁵ s^$$-$$1, $$\omega$$₀ = 5 $$\times$$ 10¹⁵ s^$$-$$1. This radiation falls on a metal whose stopping potential is $$-$$2 eV. Then, which of the following statements is/are true ? (h = 6.62 $$\times$$ 10^$$-$$34 J-s)

A point source of light is used in an experiment of photoelectric effects. If the distance between the source and the photoelectric surface is doubled, which of the following may result?

Electrons are emitted with kinetic energy T from a metal plate by an irradiation of light of intensity J and frequency v. Then, which of the following will be true?