HOW MANY SHADOWS WE HAVE?
Why should we not look at a solar eclipse with naked eyes?
the light we get from a bulb is luminous or non--luminous
What is Solar Eclipse?Explain.
From which pariticle did the sun is made?
what di neil Armstrong say after landing on the moon? findout.
what is penumbra and what is umbra?
how do concve mirrors spread light?
what would happen in the absence of gravity on the earth?
the moon changes its shapes every night yes or no ? give reasons
no shadow is formed when light hits a transparent object. why?
why is the moon a lonely and silent place?
there is no rain on the moon. why?
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