waves - flashcards

What is the wave speed equation?

wave speed = frequency x wavelength

What direction do transverse waves vibrate?

Sideways/perpendicular.

What direction do longitudinal waves vibrate?

Parallel.

How do you work out wave speed using distance and time?

wave speed = distance/time

What can happen when a wave meets a boundary?

Absorbed
Transmitted
Reflected

What is refraction?

Waves changing direction at a boundary.

What is the normal?

Imaginary line that is perpendicular to the point where the incoming hits the boundary.

What is the electromagnetic spectrum?

Radio waves.
Micro waves.
Infrared.
Visible light.
Ultraviolet.
X-ray waves.
Gamma rays.

True or False.
Gamma rays can cause and cure cancer.

True.

What are 2 uses of x-rays?

Detect broken bones
Detect metal objects in the body

What is a danger of x-rays?

Cancer.

What are 2 uses of ultraviolet?

Detect forged bank notes
Destroying bacteria

What is a danger of ultraviolet rays?

Sunburn

What are 2 uses of visible light?

Seeing
Photography

What is a danger of visible light?

Damage to retina cells.

What are 2 uses of infrared?

Remote control

Cooking

What are dangers of infrared?

Burns
Low blood pressure

What are 2 uses of micro waves?

Cooking

Satellite signals

What is a danger of micro waves?

Burns

What is a use of radiowaves?

Communication

Are there any dangers of radiowaves?

No

What are electromagnetic waves made up of?

Oscillating charges.