What is the energy of a photon whose momentum is the same as that of a proton whose kinetic energy is 10.0 MeV? A. 137 MeV B. 188 MeV C. 200 MeV D. 123 MeV E. 288 MeV
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- When light of wavelength 244nm illuminates an aluminum surface, a stopping potential of 1.0V is needed to reduce the photoelectric current to zero. a. Find the work function of aluminum. b. Find the wavelength of light that would require a stopping potential of 1.5 V.Which one of the following statements is true regarding red photons and blue photons traveling through vacuum? A) Red light travels faster than blue light and carries more energy. B) Blue light travels faster than red light and carries more energy. C) Red light travels at the same speed as blue light and carries more energy. D) Blue light travels at the same speed as red light and carries more energy.19 A 982 W bulb produces monochromatic U-V light of frequency 3.71x1 Hz. The light falls on 15 a clean metal whose cut-off frequency is 5.49x1014 Hz. Find the maximum speed of the emitted electrons, in m/s.
- An FM radio station of frequency 98.1 MHz puts out a signal of 50,000 W. How many photons/s are emitted?3.0 eV photons excite atoms in a gas from their ground state to the n = 3 excited state. The atoms are then observed emitting 2.0 eV photons. Usingwhat you learned in the table above, what other emitted photon energies would be observed?A. 3.0 eV and 5.0 eV B. 3.0 eV and 1.0 eV C. 1.0 eV and 4.0 eVD. 3.0 eV only E. 1.0 eV onlyTwo radio stations have the same power output from their antennas. One broadcasts AM at a frequency of 1000 kHz and one broadcasts FM at a frequency of 100 MHz. Which statement is true?A. The FM station emits more photons per second.B. The AM station emits more photons per second.C. The two stations emit the same number of photons per second.
- 1. An FM radio transmitter has a power output of 150 kW and operates at a frequency of 99.7 MHZ. How many photons per second does the transmitter emit?Suppose a linear accelerator (linac) creates a X-ray beam where every individual photon has an energy of 19 MeV. If 3x1010 photons are produced over 90x10-15 s, as measured through an area of 3.1 m², determine the intensity of the X-ray beam. I = B W/m²3. What speed must an electron have if its momentum is to be the same as that of an X-ray photon with a wavelength of 0.30 nm? m/s of19 o oof