Final Exam Review: AKS 10, 11

Final Exam Review: AKS 10, 11

AKS 10: Waves & Sound

AKS 11: EM & Visible Light

AKS 13: Nuclear

AKS 10: Sound & Waves

Wave Anatomy

Crest

Trough

Amplitude

Wavelength

Speed of sound is determined by the medium it travels through

Remember, sound (and all mechanical waves) CANNOT travel through a vacuum

Within a given medium, the temperature also affects the speed!

The warmer the medium, the faster the sound can travel

Features of sound

Pitch = frequency

Loudness/Intensity = amplitude

Doppler Effect

Apparent change in frequency (pitch) due to the motion of the sound source or the sound observer.

Multiple Choice

Which number represents the amplitude of the wave in the diagram?

• 1

• 2

• 3

• 4

Multiple Choice

Which wave has the highest frequency?

• 1

• 2

• 3

• 4

Multiple Choice

Which medium will transmit sound the fastest?

• ocean water

• solid iron

• perfumed air

• a sponge

Multiple Choice

When a sound is louder what measurement gets bigger?

• Frequency

• Amplitude

• Wavelength

• Pitch

Multiple Choice

As the siren goes off in the PARKED car, the young woman at position Y hears

• a higher pitch than if she were inside the car

• a lower pitch than if she were inside the car

• the same pitch she would if she were inside the car

AKS 11: EM & Visible Light

Mechanical waves - MUST have a medium

Electromagnetic waves - CAN travel through a vacuum

Electromagnetic Spectrum

Type of EM wave based on the wavelength

Energy of EM waves = frequency

Frequency & Wavelength

Inverse relationship - when wavelength increases, frequency decreases

Behavior of Visible Light

White light (from the sun) is made of all wavelengths of visible light.

A prism splits the white light (disperses it) into the colors of the rainbow.

Color of objects

An object's color is determined by the wavelengths of light it REFLECTS.

Other wavelengths are ABSORBED and you don't see those colors.

White = ALL reflected

Black = ALL absorbed

Multiple Choice

How do electromagnetic and mechanical waves compare?

• Mechanical waves can only travel through a vacuum, but electromagnetic waves can travel through a solid, liquid, or gas.

• Mechanical waves can travel through a solid, liquid, or gas, but electromagnetic waves can only travel through a gas.

• Mechanical waves can only travel through a solid, liquid, or gas, but electromagnetic waves can travel through a vacuum.

• Mechanical waves can travel through a solid, liquid, or gas, but electromagnetic waves can only travel through a solid.

Multiple Choice

A wave with a long wavelength (like radio waves) will have a ______ frequency and _____ energy

• high, low

• high, high

• low, high

• low, low

Multiple Choice

White light from the sun enters a prism and is dispersed. What would you observe as the light exits the prism?

• White light

• A rainbow of colors

• No light exits the prism

• Red and blue light only

Multiple Choice

What color is an object that absorbs all the colors in the light spectrum?

• A rainbow

• White

• Black

• Invisible