Photoelectrons are emitted from a metallic surface only when the incident light has more than a certain minimum A wavelength. B speed. C frequency. D) intensity. Planck was able to obtain the correct curve for the spectrum of light emitted by a hot object by assuming that the light was mainly ultraviolet. B vibrational energies of the atomic resonators were quantized. C) atoms had only certain allowed orbits. D spectrum was continuous.

Photoelectrons are emitted from a metallic surface only when the incident light has more than a certain minimum A wavelength. B speed. C frequency. D) intensity. Planck was able to obtain the correct curve for the spectrum of light emitted by a hot object by assuming that the light was mainly ultraviolet. B vibrational energies of the atomic resonators were quantized. C) atoms had only certain allowed orbits. D spectrum was continuous.