Fertilization of an egg by sperm takes place in the

Oviduct

Explanation:

The oviduct also known as the Fallopian tube is a long narrow tube with funnel shaped opening which receives eggs (Ova) released by the ovary. So, the oviduct link the ovary with the uterus, and it is the site where sperm released from the male meet the egg to fertilize it into zygote.

Thus, oviduct is the answer

satellites are frequently used to make observations of the orbit on earth

the sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

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