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Who first proposed that light was wave-like in character?
A. Huygens
B. Newton
C. Young
D. Maxwell

Last updated date: 23rd Jul 2024
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Hint: When most people refer to light waves, they are referring to visible light. However, in physics, light waves are often used interchangeably with electromagnetic waves. Electromagnetic waves, like all waves, are made up of oscillating magnetic and electric fields and carry energy.

Complete answer:
Light is a wave, according to the wave theory, which was formulated at the same time as Newton's theory. The phenomenon of light diffraction was discovered in 1665 by Italian physicist Francesco Maria Grimaldi (1618–1663), who noted that it resembled the motion of waves.

Then, in 1678, Dutch physicist Christian Huygens (1629-1695) proclaimed the Huygens' principle and founded the wave theory of light. In 1678, Christian Huygens,hypothesised that light is made up of waves that vibrate up and down perpendicular to the direction of light movement, and thus devised a method of visualising wave propagation.

Huygens' Principle was named after him. Huygens assumed that ether vibrated in the same direction as light, forming a wave in the process. Huygens' Principle, a later volume, explained how each point on a wave might generate its own wavelets, which then added up to form a wavefront.

So, the correct option is A.

Note: The theory of Huygens applies to all forms of waves, including water, vibration, and light waves. It's useful for demonstrating the laws of reflection and refraction as well as illustrating how light waves propagate.