Waves: Sound and Light Unit

Front

What is reflection in terms of light waves?

Back

Reflection is the bouncing back of light waves when they hit a surface that does not absorb the light.

Front

True or false? The medium through which sound and light waves travel affects the SPEED of the wave.

Back

TRUE

Front

Which travels faster: light or sound?

Back

Light travels faster than sound. For example, we see the flash of lightning before we hear the thunder.

Front

What is the formula to calculate the wavelength of a wave?

Back

Wavelength (λ) = Wave Speed (v) / Frequency (f)

Front

If a sound wave has a frequency of 200 Hz and travels at 360 m/s, what is its wavelength?

Back

1.8 m

Front

What determines the color of an object?

Back

The wavelengths of the light waves that are reflected from the object determine its color.

Front

Define refraction in the context of light waves.

Back

Refraction is the bending of light waves as they pass from one medium to another, changing speed.

Front

What is the relationship between frequency and wavelength in waves?

Back

Frequency and wavelength are inversely related; as frequency increases, wavelength decreases.

Front

What is a sound wave?

Back

A sound wave is a type of mechanical wave that travels through a medium (like air, water, or solids) due to vibrations.

Front

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

Back

Approximately 343 m/s.