Lab 13- Double Slit and Refraction
PRELAB QUESTIONS
1. What is the principle of superposition and to what does it apply?
2. Two narrow slits 0.04 mm apart are illuminated by light from a HeNe laser (λ = 633 nm). The screen is located 1 m away. What is the fringe-spacing Δy?
3. How does the angle of refraction compare to the angle of incidence when a ray of light enters a medium with a higher index?
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