“Each point on a spherical wavefront may be considered a source of secondary spherical wavefronts”. This is known as the A. Snell’s law B. D’Alembert’s principle C. Appleton’s theory D. Huygen’s principle

“Each point on a spherical wavefront may be considered a source of secondary spherical
wavefronts”. This is known as the
A. Snell’s law
B. D’Alembert’s principle
C. Appleton’s theory
D. Huygen’s principle
by

1 Answer

Answer :

D. Huygen’s principle
by

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