1. Explain how noctilucent clouds might be illuminated so they are visible to an Earthbound observer 1 answer below »

1. Explain how noctilucent clouds might be illuminated so
they are visible to an Earthbound observer after sunset.

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2. Do you think noctilucent clouds are composed of
water droplets or ice crystals?

3. What process is responsible for the colors exhibited by
coronas and iridescent clouds?

4. How can coronas be distinguished from 22° halos?

5. Explain why a mirage disappears when the observer gets
near.