# Question

A metal with a work function of 2.40 eV is illuminated by a beam of monochromatic light. If the stopping potential is 2.50 V, what is the wavelength of the light?

## Answer to relevant Questions

Find the approximate temperature of a red star that emits light with a wavelength of maximum emission of 700 nm (deep red). The work function of a material is 3.5 eV. If the material is illuminated with monochromatic light (λ = 300m), what are (a) The stopping potential and (b) The cutoff frequency? What is the change in wavelength when monochromatic X-rays are scattered by electrons ons through an angle of 30°? Find the radius of the electron orbit in a hydrogen atom for states with the following principal quantum numbers: (a) n = 2, (b) n = 4, (c) n = 5. The hydrogen spectrum has a series of lines called the Lyman series, which results from transitions to the ground state. What is the longest wavelength in this series, and in what region of the EM spectrum does it lie?Post your question

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