What Observational Setup Is Required to Observe Backlit Rings

question 67

Multiple Choice

What observational setup is required to observe backlit rings?

• A) The light source doing the backlighting has to have wavelengths much longer than the size of the ring particles.
• B) The light source doing the backlighting has to have wavelengths comparable to the size of the ring particles.
• C) The light source doing the backlighting has to have wavelengths much shorter than the size of the ring particles.
• D) The light source doing the backlighting must be a blackbody source peaking in the visible part of the spectrum.
• E) The light source doing the backlighting must be very distant

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