Red Shift

Front

What is a light year?

Back

A light year is a unit of distance that represents how far light travels in one year, approximately 5.88 trillion miles (9.46 trillion kilometers).

Front

What happens to the wavelength when the frequency of a wave increases?

Back

When the frequency of a wave increases, the wavelength gets shorter.

Front

What is Redshift?

Back

Redshift is the phenomenon where light from objects moving away from us shifts towards the red end of the spectrum, indicating that the object is receding.

Front

What is the definition of wavelength?

Back

Wavelength is the distance from peak to peak (or trough to trough) of a wave.

Front

Which type of electromagnetic wave has the greatest frequency?

Back

Gamma rays have the greatest frequency among electromagnetic waves.

Front

What is the relationship between frequency and energy in electromagnetic waves?

Back

The energy of electromagnetic waves is directly proportional to their frequency; higher frequency waves carry more energy.

Front

What is the Doppler effect in relation to light?

Back

The Doppler effect refers to the change in frequency or wavelength of light from an object moving relative to an observer, causing redshift or blueshift.

Front

What does it mean if an object exhibits blueshift?

Back

Blueshift occurs when an object is moving towards the observer, causing the light to shift towards the blue end of the spectrum.

Front

How does the speed of light relate to redshift?

Back

Redshift occurs because the speed of light is constant, and as objects move away from us, the light waves are stretched, increasing their wavelength.

Front

What is the significance of redshift in astronomy?

Back

Redshift is significant in astronomy as it helps determine the speed and distance of galaxies, providing evidence for the expansion of the universe.