(Solved): QUESTION 27 What is the wavelength, in nm, of a 1.94-eV photon? Normal format with 4SF. Hint: 1eV=1. ...

QUESTION 27 What is the wavelength, in

, of a

photon? Normal format with

. Hint:

. QUESTION 28 In the previous question, the type of EM radiation is A. Ultraviolet B. radio & TV C. Gamma rays D. Visible light QUESTION 29 What is the longest wavelength {in m} of the EM radiation that can eject photoelectrons from a certain metal target, given that the binding energy is

? Exponential format with

. QUESTION 30 When ultraviolet light with a wavelength of

falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is measured to be

. How much energy, in Joule, does an electron have to gain in order to escape from the metal surface? Exponential format with

.