Science MCQs

Light travels fastest in a vacuum where there is no matter to slow it down.

Refractive index = speed of light in vacuum / speed of light in the medium.

Refraction makes the bottom seem closer than it actually is.

Critical angle is the angle of incidence where the angle of refraction is 90°.

Total internal reflection occurs when light reflects completely inside a denser medium.

It occurs when the angle of incidence is greater than the critical angle.

Binoculars use prisms to reflect light and shorten the device length.

A mirage is an optical illusion caused by refraction and total internal reflection in air layers.

Hot air near the road bends light upward creating a reflected sky image that looks like water.

Dispersion is the separation of white light into its constituent colors.