Science MCQs

Echo is the reflection of sound waves from a hard surface.

Light travels much faster than sound so we see lightning first.

Wavelength is the distance between two consecutive crests or troughs.

Red light has the longest wavelength in the visible spectrum (around 700 nm).

Radio waves are used for radio TV and phone communication.

Microwaves are used in microwave ovens to heat food.

X-rays can penetrate soft tissues and show bones.

Wavelength is represented by the Greek letter lambda (λ).

Wavelength is measured in meters (m).

Dropping a pebble in water produces ripples or waves on the surface.