Exam 5: Radiation and Spectra

The Balmer Series of lines in the hydrogen atom was very important in the history of physics and astronomy. What made it so important?

We observe a glowing cloud of gas in space with a spectroscope. We note that many of the familiar lines of hydrogen that we know on Earth seem to be in a different place. They are shifted toward the blue or violet end of the spectrum compared to their positions in the spectrum of glowing hydrogen gas on Earth. From this we can conclude that:

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

Two stars have the same diameter and are at the same distance from us (but in different parts of the sky.) Star A has a temperature of 4000 K, while star B has a temperature of 8000K. Which of the following statements is true:

Which of the following is not a type of electromagnetic wave with lower energy than visible light waves?

The fastest speed in the universe is:

The energy of random atomic and molecular motion is called

You are alone in a large, completely dark auditorium on Earth. What kind of telescope should I use from the other side of the auditorium to detect the electromagnetic radiation emitted by your body?

An idealized object that does not reflect or scatter any radiation that hits it, but simply absorbs every bit of radiation that falls on it is called:

The idea that atoms radiate energy only when their electrons move from higher to lower energy levels was first advanced by:

(In the absence of a strong magnetic field), what is the chief factor that determines what type of electromagnetic radiation objects give off:

Of the following, which consists of electro-magnetic waves with the shortest wavelength?

What happens as an electron falls from a higher level to a lower level in an atom?

Which of the following statements about electromagnetic radiation is FALSE?

One reason that human eyes evolved to detect visible light is:

Most ultraviolet radiation does not penetrate to the Earth's surface. Instead it is absorbed in:

How fast do electro-magnetic waves travel?

An astronomer discovers a new star and wants to measure its temperature. She would typically do this by:

When a star or galaxy is moving away from us, we observe the Doppler effect by seeing the lines in its spectrum