Doppler Effect

Long sound waves are...

• high pitched
• low pitched
• medium pitched

Long sound waves are...

• high pitched
• low pitched
• medium pitched

Long sound waves are...

• high pitched
• low pitched
• medium pitched

When the car moves AWAY from you, its horn seems...

• Low pitched
• High pitched
• Normal

What can you tell about the motion of this object?

• Moving left.
• Moving right quickly.
• Standing still. 
• Moving up slowly. 

What direction is this object moving?

• left
• right
• up
• down

What do the light waves of a galaxy that is moving TOWARD us look like?

• red shifted
• blue shifted
• green shifted
• yellow shifted

The pitch of a sound wave relates to the wave's _________________.

• Amplitude

• Frequency

• Wavelength

• Period

What is the Doppler Effect?

• A change in frequency due to the relative motion of a wave source and an observer

• When a wave overlaps with another wave

• When a wave bounces off of another object

• When a wave bends due to traveling through a different medium

An ambulance is driving towards you as you stand on the sidewalk. What happens to the pitch of the siren as it comes towards you?

• It increases

• It decreases