Name the various theories of the nature of light.

1.	Name the various theories of the nature of light.
Answer» The various theories of the nature of light from the 17th century to modern times are 1. Descartes’ corpuscular theory of light (1637) 2. Newton’s corpuscular theory (1666) 3. Huygens’ wave theory of light propagation (1678), modified, verified, and put on a firm mathematical base by Young, Fraunhofer, Fresnel, and Kirchhoff (in the 1800s) 4. Maxwell’s electromagnetic theory (1865) 5. the light quantum, i.e., the photon model of the modern quantum theory by Planck (1900) and Einstein (1905).

Answer»

The various theories of the nature of light from the 17th century to modern times are

1. Descartes’ corpuscular theory of light (1637)

2. Newton’s corpuscular theory (1666)

3. Huygens’ wave theory of light propagation (1678), modified, verified, and put on a firm mathematical base by Young, Fraunhofer, Fresnel, and Kirchhoff (in the 1800s)

4. Maxwell’s electromagnetic theory (1865)

5. the light quantum, i.e., the photon model of the modern quantum theory by Planck (1900) and Einstein (1905).

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