1) A beam of light propagating at an angle α1 from a medium 1 through to another medium 2 at an angle α2. If the wavelength of light in medium 1 is λ1 , then the wavelength of light in medium 2, (λ2) , is A) sinα2sinα1λ1 B) sinα2sinα1λ2 C) (α1α2)λ1 D) λ1 Answer: Option AExplanation: We know that , λ=λ0μ According to the question, sinα1sinα2=μ2μ1=λ1λ2 λ2=λ1sinα2sinα1