The longest wavelength of light humans can see is around 750 nm, deep red. If we were to observe a green - colored space probe approaching a stellar black hole of 20 solar masses, how close to the event horizon would it be when it just turned invisible? Green light has a wavelength around 520 nm. Answer
The longest wavelength of light humans can see is around 750 nm, deep red. If we were to observe a green - colored space probe approaching a stellar black hole of 20 solar masses, how close to the event horizon would it be when it just turned invisible? Green light has a wavelength around 520 nm. Answer
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Transcribed Image Text:The longest wavelength of light
humans can see is around 750 nm,
deep red. If we were to observe a
green - colored space probe
approaching a stellar black hole of 20
solar masses, how close to the event
horizon would it be when it just
turned invisible? Green light has a
wavelength around 520 nm. Answer
in km Answer:Question 4
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