F: Types of Light Source

Question 1

Radiation of the complete spectrum of
light from the sun and stars; the
reflection of sunlight of the moon, sky,
clouds, earth and bodies of water,
lighting; Aurora Borealis, Aurora
Australis, and Bioluminescence (light
produced from the oxidation of chemical
compounds by plants and animals).

Answer 1

Natural Phenomena

Question 2

As an element is heated its molecules become
increasingly active until the temperature
elements reaches about 500 °C, only heat
radiation is released from 500° to 600°
infrared is also produced.

Answer 2

Incandescence or Temperature Radiation

Question 3

When an electric current is introduced through
a gas or solid which is composed of a single
valence electron, it causes the valence
electrons to temporarily rise to a higher level
of energy. When the electron resumes its
natural states, it radiates energy in the form
of light.

Answer 3

Luminescence