Review - Astronomical Instruments

The light which allows you to see this very interesting exam is made up of waves. In these waves, the distance between troughs is called the:

• frequency

• velocity

• wavelength

• amplitude

How fast do electro-magnetic waves travel?

• at the speed of sound

• at the speed of light

• at the speed of charge

• at different speeds, depending on the temperature of the atoms that produce them

Which of the following has the shortest wavelength?

• radio waves

• visible light waves

• ultraviolet waves

• x-rays

The ozone layer absorbs the majority of which type of electromagnetic radiation?

• radio waves

• visible light

• infrared

• ultraviolet

What is the unit for frequency?

• nanometers (nm)

• meters (m)

• Hertz (Hz)

• seconds (s)

The two primary functions of a telescope are:

• reflect light from the sun

• collect as much light as possible

• focus light into an image

• invert images

What major development changed observatories around 1610?

• light pollution decreased

• telescopes began to be used for astronomy

• mirrors were invented

• computers were invented

Galileo is credited with which of the following?

• inventing mirrors

• being the first to point a spyglass at the sky

• launching the first telescope in space

• discovering infrared radiation

The aperture of a telescope is a measure of its

• diameter

• length

• color

• wavelength

Which of the following telescopes came first?

• adaptive optics

• radio telescopes

• reflectors

• refractors