Mechanical and Electromagnetic Waves

Front

What are electromagnetic waves?

Back

Electromagnetic waves are waves that can travel through the vacuum of space and consist of oscillating electric and magnetic fields. Examples include radio waves, microwaves, X-rays, and gamma rays.

Front

What is amplitude in the context of waves?

Back

Amplitude is the maximum distance that a wave's crest or trough moves from its rest position. It indicates the energy of the wave; higher amplitude means more energy.

Front

What is wavelength?

Back

Wavelength is the distance between two consecutive crests or troughs in a wave. It is usually measured in meters.

Front

What is the relationship between frequency and wavelength?

Back

Frequency and wavelength are inversely related; as the frequency of a wave increases, its wavelength decreases, and vice versa. This relationship is described by the equation: speed = frequency × wavelength.

Front

What is the speed of a wave?

Back

The speed of a wave is the distance it travels per unit of time. It can be calculated using the formula: speed = frequency × wavelength.

Front

What is the difference between mechanical and electromagnetic waves?

Back

Mechanical waves require a medium (like air, water, or solid materials) to travel through, while electromagnetic waves do not require a medium and can travel through a vacuum.

Front

What is the term for the number of waves that pass a point in a given time period?

Back

Frequency.

Front

What is the unit of frequency?

Back

Hertz (Hz), which represents one cycle per second.

Front

What is a crest in a wave?

Back

A crest is the highest point of a wave, representing the maximum displacement of the medium from its rest position.

Front

What is a trough in a wave?

Back

A trough is the lowest point of a wave, representing the minimum displacement of the medium from its rest position.