Astronomy Quiz 1

How long does it take the Moon to go from full to new and back to full again (a synodic month)?

• exactly 4 weeks

• exactly 27.3 days

• exactly 29.5 days

• exactly 30 days

The electromagnetic spectrum in order from longest to shortest wavelength is

• Radio, Gamma, X-ray, Infrared, Visible, Ultraviolet, Microwave

• Microwave, Radio, Ultraviolet, Visible, Infrared, Gamma, X-ray

• Radio, Microwave, Infrared, Visible, Ultraviolet, X-ray, Gamma

• Visible, Ultraviolet, Infrared, Microwave, Gamma, X-ray, Radio

One convenient consequence of gamma rays is that

• their wavelength is small so their telescopes are small

• they can be focused easily

• they have high energy that can come through the atmosphere

• they are faster than other types of light rays

Frequency is

• the number of crests that pass by in a second

• not the same thing as pitch

• not related to the wavelength

• the distance between crests

The advantage of a reflecting telescope is that

• the mirror can be supported on the entire back side

• there is only one surface to polish

• reflecting telescopes are shorter in length

• all of the above

The longer the wavelength of electromagnetic radiation

• the lower the energy

• the higher the energy

• the smaller the amplitude

• the slower it travels

Blackbody radiation is

• given off because of temperature

• not related to temperature

• only accurate for objects that are black

• not important for learning about astronomical objects

The Moon has phases because

• the Sun does not light the Moon evenly all month

• the part that we see gets different amounts of light throughout its cycle

• the shadow of the earth gets in the way

• all of the above

Eratosthenes was successful at measuring the distance to the Sun.

• True

• False

One problem with lenses is that different frequencies of light are focused in different spots; this is called

• chromatic aberration

• spherical aberration

• disrefraction

• angular resolution