The energies of two photons you might detect emitted by hydrogen atoms are 10.2 and 2.1 eV. Which photon has the longest wavelength?
A) the 10 eV photon
B) the 2.1 eV photon
C) They both have the same wavelength.
B
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A 1.40-cm-tall object is placed along the principal axis of a thin convex lens of 13.0 cm focal length. If the object distance is 19.2 cm, which of the following best describes the image distance and height, respectively?
a. 7.75 cm and 4.34 cm b. 40.3 cm and 2.94 cm c. 7.75 cm and 7.27 cm d. 9.16 cm and 4.34 cm e. 41.4 cm and 0.668 cm
One type of medical imaging process is called positron emission tomography. Radioactive material is injected into a patient; during the radioactive decay the material emits a positron, which then interacts with an atomic electron, emitting gamma rays, which are detected by the imager. This gamma ray emission process is called:
A) pair production B) annihilation C) absorption D) alpha decay E) fission
What is the momentum of a 600. nm photon?
A) 2.07 N-s B) 2.07 eV/c C) 2.07 KeV/c D) 2.07 MeV/c E) 2.07 kN-m
The nucleus of a hydrogen atom, a proton, sets up an electric field. The distance between the proton and electron is about 5.1 × 10^?11 m. What is the magnitude of the electric field at this distance from the proton? [The charge on the proton is +1.6 × 10^?19 C.]