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Easy
What is the speed of light in vacuum?
Easy
Which of the following is a source of natural light?
Medium
Why do we see a rainbow after rain?
Medium
Which phenomenon explains why a pencil looks bent when placed in a glass of water?
Medium
In which medium does light travel fastest?
Medium
What type of mirror is used in a car’s side rear-view mirror and why?
Hard
Which color of light bends the most when passing through a prism?
Hard
If a ray of light passes from air into water, what happens to its speed and direction?