When a beam of light enters one medium from another, which quantity will not change? ∙ a. Direction ∙ b. Speed ∙ c. Frequency ∙ d. Wavelength

When a beam of light enters one medium from another, which quantity will not change? ∙ a. Direction  
∙ b. Speed  
∙ c. Frequency  
∙ d. Wavelength
by

1 Answer

Answer :

c. Frequency
by

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