The frequency of a photon in terahertz if it has an energy of 4.0 eV .

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Chapter 42, Problem 26SP

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The frequency of a photon in terahertz if it has an energy of 4.0 eV.

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QUESTION 1 A photon emitted by a blackbody has an energy of 1.021 J. What is the frequency of such a photon?(h=6.63.10-34 J.s) QUESTION 2 What is the energy (in eV) of a gamma-ray photon with frequency f=5.67-102¹ Hz? (h=4.136-10-15eV/Hz) QUESTION 3 The ground level of the hydrogen atom has an energy E,= 13.6 eV while the first excited state has an energy Calculate the energy difference of an electron going from the first excited state back to the ground state. 1 QUESTION 4 What is the frequency of the photon emitted by the electron in Question 3? QUESTION 5 E 2= -3.4 eV. An electron has a wavelength of 0.267 nm (1 nm = 10-9 m). What is the speed of such electron orbiting the nucleus? ( m=9.11-10-31 kg)

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The energy in eV of a photon, if the frequency of the radiation is 7 × 10¹ Hz is 4.0 eV 3.9 eV (a) (c) (b) 2.9 eV (d) 1.9 eV