Exam 23: Light,astronomical Observations,and the Sun

Sunspots appear dark because they are cooler than the surrounding solar surface.

The first scientist to use a telescope for astronomical purposes was ________.

The type of spectrum produced by a common light bulb is a ________.

There are websites that predict solar weather,or essentially the impact of the solar wind on earth (in one sense,our planet is within the outer atmosphere of the sun).How is this possible when the speed of light is a fixed quantity?

Electromagnetic radiation that behaves like a particle is called a(n)________.

The Sun is considered an "average star."

Prominences and solar flares present dangers to astronauts primarily because ________.

If a yellow star is moving away from us very rapidly,what color will it appear to be?

Einstein's equation E = mc2 describes the conversion of mass to energy that occurs during nuclear fusion.If a billion joules of energy are released by this process,how much mass has been consumed? (Recall,a joule is a Nt-m or kg-m2/s2 and the speed of light is ~300 million m/s.)

The most explosive events to occur on the Sun are ________.

The layer of the solar atmosphere directly above the photosphere is referred to as the ________.

How do modern telescopes prevent problems of earlier telescopes that limited mirror size and stability during temperature changes?

Which of the following is not an advantage that radio telescopes have over optical telescopes?

The Sun produces energy by converting ________.

The amount of energy released during a nuclear reaction was established by the well-known scientist named ________.

The motion of a star can be determined using the ________ effect.

Shorter wavelengths correspond to more energetic photons.

corona photosphere chromosphere sunspots

The solar wind originates from ________.

granules sunspots spicules photosphere