Problem 1: Find the temperature of the surface of star 'X' given the fact that the maximum radiation intensity of the wavelength that is emitted has frequency of 1.17x1015 Hz.

Problem 5: A beam of white light is a mixture of two frequencies 4x1014 Hz and 7.90x1014 Hz and is incident on a sodium plate which has a work function Wo = 2.28 eV. a) Find the corresponding wavelengths of these 2 frequencies. b) Find the cut -off/threshold frequency required to eject sodium electrons. c) Which of the 2 frequencies satisfies the condition for sodium electrons to be ejected? d) Based on your previous answer find the given KEMAX that 1 electron will acquire once ejected. e) What is the speed of this electron?

Problem 6: Light of frequency 9.95x1014 Hz ejects electrons from a silver surface. If the max KE of the ejected electrons is 0.113 eV, find work function (binding energy) for silver. What frequency this corresponds to?

Problem 1: Find the temperature of the surface of star 'X' given the fact that the maximum radiation intensity of the wavelength that is emitted has frequency of 1.17x1015 Hz. Problem 5: A beam of white light is a mixture of two frequencies 4x1 014 Hz and 1903:1014 Hz and is incident on a sodium plate which has a work function W.) = 2.28 eV. a] Find the corresponding wavelengths of these 2 frequencies. b] Find the cut -offfthreshold frequency required to eject sodium electrons. c] Which of the 2 frequencies satises the condition for sodium electrons to be ejected? d) Based on your previous answer find the given HEM that 1 electron will acquire once ejected. e] What is the speed of this electron? Problem 6: Light of frequency 9.95:;1014 Hz ejects electrons from a silver surface. If the max KE of the ejected electrons is I11 13 e'v', nd work function [binding energy} for silver. What frequency this corresponds to