Question

please give all questions answers​

Answer 1

a)A light source emits electromagnetic radiation. Some sources you encounter everyday are the sun, light bulbs, etc.

b)Natural sources-sun,stars,etc.

Artificial sources-candle,bulbs,etc.

c)The following three things are required for a shadow to form: a source of light, an opaque object,a screen or surface behind the object.

d)Eclipses can occur only when the Sun is within about 15 to 18 degrees of a node, (10 to 12 degrees for central eclipses). This is referred to as an eclipse limit.

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