Light+Telescopes

Front

What is the equation to calculate the temperature of a blackbody?

Back

T = 3 x 10^6 nm*K / λ_max

Front

What type of optical element do reflecting telescopes use to focus light?

Back

Mirror

Front

How do you calculate the energy of light with a wavelength of 150 nm?

Back

Energy = (1240 nm eV) / 150 nm

Front

When observing a galaxy 2 billion light years away, how old is the light we see?

Back

2 billion years ago

Front

Which type of light waves has the longest wavelength?

Back

Radio waves

Front

What is the speed of light in a vacuum?

Back

Approximately 3 x 10^8 meters per second

Front

What is the relationship between wavelength and frequency of light?

Back

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

Front

What is the electromagnetic spectrum?

Back

The range of all types of electromagnetic radiation, including visible light, radio waves, and gamma rays.

Front

What is the principle of a refracting telescope?

Back

It uses lenses to bend (refract) light to focus images.

Front

What is the significance of λ_max in blackbody radiation?

Back

λ_max is the wavelength at which a blackbody emits the most radiation.