Astronomy and Cosmology: Standard candles

Astronomy and Cosmology: Standard candles

12th Grade

6 Qs

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Astronomy and Cosmology: Standard candles

Astronomy and Cosmology: Standard candles

Assessment

Quiz

Physics

12th Grade

Easy

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6 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT a unit to measure distances in astronomy?

pc

Mpc

ly

F

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is meant by luminosity of a star?

The total energy of radiation emitted by a star.

The total power of radiation emitted by a star.

The intensity per unit area emitted by a star.

The total power per unit area emitted by a star.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the unit of luminosity?

W

J

W m-2

J m-2

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Define radiant flux intensity.

The radiant power passing normally through a surface per unit area.

The total power of radiation emitted by a star.

Astronomical object of known luminosity.

The distance travelled by electromagnetic waves throug vacuum in one year.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the unit of radiant flux intensity?

J

N m

pc

W m-2

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the term used to describe an astronomical object that has known luminosity?

cepheid variable

standard candle

blackbody

supernova