Waves Review - 6th

Front

What is a wavelength?

Back

The distance between two consecutive points of the same phase on a wave, such as crest to crest or trough to trough.

Front

What type of wave requires a medium to travel?

Back

Sound waves require a medium (such as air, water, or solids) to travel.

Front

Why does an apple appear red?

Back

An apple appears red because it reflects red light and absorbs all other visible wavelengths.

Front

What happens to scientific beliefs when new evidence contradicts them?

Back

Scientific beliefs must be revised or reconsidered when new evidence contradicts previous conclusions.

Front

What is reflection in the context of light waves?

Back

Reflection is the bouncing back of light waves when they hit a surface.

Front

What is the difference between regular and irregular reflection?

Back

Regular reflection occurs on smooth surfaces, resulting in clear images, while irregular reflection occurs on rough surfaces, scattering light in many directions.

Front

What is the role of a medium in wave propagation?

Back

A medium is the substance through which a wave travels; it can be solid, liquid, or gas.

Front

What is the principle of superposition in wave theory?

Back

The principle of superposition states that when two or more waves overlap, the resulting wave is the sum of the individual waves.

Front

How do light waves interact with surfaces?

Back

Light waves can be reflected, refracted, or absorbed when they interact with surfaces.

Front

What is the speed of sound in air at room temperature?

Back

The speed of sound in air at room temperature (20°C) is approximately 343 meters per second.