Name a luminous object- ARLIN, what is transparent object?-HEZA, what is an opaque object?-FARIN, what is an example of opaque object?-AARATHI, what is the characteristic of opaque object?- FARIN, what is the condition for the formation of a shadow?- SREYA, which are the parts of a shadow?-PARVATHI, what is umbra?-AYSHA , what is penumbra?-AYLIN.

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