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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 when sunlight passes through water droplets?
Medium
Which phenomenon causes the apparent bending of a stick partially submerged in water?
Medium
In which medium does light travel fastest?
Medium
What type of mirror is used in the headlights of an Indian car to produce a parallel beam of light?
Hard
If the angle of incidence is 30° and the angle of refraction is 19°, what is the refractive index of the medium?
Easy
Why does the sky appear blue during the day in India?