2024 Fall Semester Final Review - Part 1

Front

What is frequency?

Back

Frequency is the number of cycles of a wave that occur in a unit of time, typically measured in Hertz (Hz).

Front

How do you calculate frequency?

Back

Frequency (f) can be calculated using the formula: f = number of cycles / time (in seconds).

Front

What happens to the brightness of light when its amplitude increases?

Back

Increasing the amplitude of a light wave increases its brightness.

Front

What is the relationship between distance and gravitational force?

Back

The gravitational force decreases with the square of the distance between two objects. If the distance is doubled, the force becomes 1/4 as much.

Front

What is a longitudinal wave?

Back

A longitudinal wave is a wave in which the particles of the medium move parallel to the direction of the wave's propagation.

Front

What is the Doppler effect?

Back

The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source.

Front

What does it mean if a galaxy is moving towards us?

Back

If a galaxy is moving towards us, its light is shifted towards the blue end of the spectrum, indicating a decrease in wavelength.

Front

What is amplitude in the context of waves?

Back

Amplitude is the maximum extent of a wave's displacement from its rest position, related to the energy of the wave.

Front

How does sound travel through different materials?

Back

Sound travels through different materials by causing particles in the medium to vibrate, transferring energy through collisions.

Front

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

Back

The speed of sound in air at room temperature (20°C) is approximately 343 meters per second.