21st Century Astronomy
21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 6.2, Problem 6.2CYU
To determine

The advantage of CCD cameras having high quantum efficiency.

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Explain why different elements produce different spectral absorption and emission lines.  Calculate the wavelength of a photon that has an energy of  4.96 eV. (Hint: h*c {Planck's constant * the speed of light }= 1240 eV*nm;) What type of radiation/light (from the electromagnetic spectrum) is the photon from the previous question?  Why is it that radio telescopes need to be so large or organized in arrays? this is all one question with different parts. Thank you.
Imagine a photon that was determined to have a wavelength of 150 nm. Remembering that the speed of light is 3*10^8 m/s, what is the frequency of that light in units of Hz? (Provide only the number with commas to help count off orders of ten accurately, do not use scientific notation)
One molecule of ATP provides 0.3 eV when used by the cell.  Photosynthesis in a typical plant uses 8 photons at the nominal wavelength of 525 nm to produce 1 ATP.  What percentage of the light energy is converted into chemical energy in the form of ATP?  Give your answer to 2 significant digits. *0.016 is incorrect
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