Explain briefly the principle of operation of APD photodetector. What are the main parameters to consider in selecting photodetectors?
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- checking answer The spectrum of another astronomical object has a peak wavelength of 51 nanometers. What is the likely surface temperature of this object? Make that calculation, showing your workQUESTION When an electron undergoes a transition from a higher to lower state in singly ionized helium, how will the energy of the emitted photon compare with the analogous transition in hydrogen? Explain. (Select all that apply.) O The transition energy will be higher in singly ionized helium. O This happens because the helium atom has more protons. O This happens because the helium nucleus is less massive. The transition energy will be lower in singly ionized helium. This happens because the helium atom has more neutrons.After you calibrate the SpectroVis Plus spectrometer, you must a. run a full spectrum by selecting Sensors/Calibrate/Full Spectrum. O b. change the mode by selecting Sensors/Time-Based. Oc. collect a full spectrum of the sample to determine the wavelength of maximum absorbance. O d. change the mode by selecting Sensors/Data Collection.