![]() ![]() ![]() This interaction time cannot be increased by lowering the light intensity. The absence of a lag time means that these one-on-one interactions occur instantaneously. LP modes of step-index-fibers, one might be able to derive analytical equations. In Einstein’s interpretation, interactions take place between individual electrons and individual photons. What is the formula for the cut-off wavelength of a fiber mode Answer from the author: The cut-off wavelength can usually not be calculated simply with some formula, but needs to be determined e.g. The experimental setup to study the photoelectric effect is shown schematically in Figure \(\PageIndex\): Typical Values of the Work Function for Some Common Metals Metal Electrons that are emitted in this process are called photoelectrons. This phenomenon is known as the photoelectric effect. When a metal surface is exposed to a monochromatic electromagnetic wave of sufficiently short wavelength (or equivalently, above a threshold frequency), the incident radiation is absorbed and the exposed surface emits electrons. Describe how Einstein’s idea of a particle of radiation explains the photoelectric effect. ![]() Explain why the photoelectric effect cannot be explained by classical physics.Describe physical characteristics of the photoelectric effect.By the end of this section you will be able to: ![]()
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