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This works on the principle of total internal reflection
3.
Reflection in a rough surface
4.
Objects that allow light to pass through partially
5.
Objects that allow light to pass through completely
6.
Darkest part of a shadow
8.
Lighter shade of shadow
9.
Objects that donot allow light to pass through
10.
Incident which occurs when any astronomical object is partially or fully obscured due to placement of another astronomical object in the presence of light
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1.
Reflection in a smooth surface
7.
Polished or smooth surface which forms image by reflection