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Preview questions
1. What is the speed of light in a vacuum?
3 x 10^8 m/s · 3 x 10^6 m/s · 3 x 10^5 m/s · 3 x 10^7 m/s
2. Which of the following is a property of light?
It can travel through a vacuum · It has mass · It cannot be reflected · It travels faster in water than in air
3. What phenomenon explains the bending of light when it passes from one medium to another?
Reflection · Refraction · Dispersion · Diffraction
4. Which color of light has the highest frequency?
Red · Green · Blue · Violet
5. What type of lens is thicker at the center than at the edges?
Concave lens · Convex lens · Biconcave lens · Biconvex lens
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