Light Video

What is light considered at its most basic level?

• A particle

• A form of matter

• A form of energy

• A sound wave

What two types of fields are intertwined to form light?

• Gravitational and magnetic

• Electric and gravitational

• Electric and magnetic

• Sound and light

How does the energy of light relate to its wavelength?

• Shorter wavelengths have less energy

• Longer wavelengths have more energy

• Shorter wavelengths have more energy

• Wavelength and energy are unrelated

When an object is heated, how does the light it emits change?

• It emits light with longer wavelengths

• It emits light with lower energy

• It emits light with shorter wavelengths

• It stops emitting light

How do electrons move between energy levels within an atom?

• They can occupy any position between energy levels.

• They must absorb or emit a precise amount of energy to jump between discrete levels.

• They continuously orbit the nucleus, gradually changing energy.

• They only move to higher energy levels when the atom is heated.

What happens when an electron in an atom absorbs light with the exact amount of energy needed?

• The electron is ejected from the atom.

• The electron moves to a higher energy level.

• The atom becomes ionized.

• The light is reflected without any change.

How can scientists determine the chemical composition of distant astronomical objects without physically touching them?

• By analyzing the gravitational pull they exert on other objects.

• By measuring the specific colors of light they emit or absorb.

• By sending probes to collect samples from them.

• By observing their movement across the sky over time.

What does a "redshift" in the light from a distant astronomical object indicate about its motion?

• The object is moving towards the observer.

• The object is stationary relative to the observer.

• The object is moving away from the observer.

• The object is rotating rapidly.