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Stars Practice Questions

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The following physics revision questions are provided in support of the physics tutorial on Stars. In addition to this tutorial, we also provide revision notes, a video tutorial, revision questions on this page (which allow you to check your understanding of the topic) and calculators which provide full, step by step calculations for each of the formula in the Stars tutorials. The Stars calculators are particularly useful for ensuring your step-by-step calculations are correct as well as ensuring your final result is accurate.

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Cosmology Learning Material
Tutorial IDTitleTutorialVideo
Tutorial
Revision
Notes
Revision
Questions
22.4Stars

Stars Revision Questions

1. Two stars s1 and s2 belong to class 1 and class 3 of illumination respectively. What is the ratio of illumination b1/b2 they produce?

  1. 1/3
  2. 3
  3. 0.8
  4. 6.3

Correct Answer: D

2. What is the illumination of Sirius (the brightest star in the sky) in lux given that its apparent magnitude is -1.46. Take the value of constant A = -19.

  1. 0.049
  2. -20.4
  3. 1/10964782
  4. 0.077

Correct Answer: C

3. What is the surface temperature of a blue-colour star? Take the wavelength of blue colour equal to 450 nm.

  1. 6440 K
  2. 5800 K
  3. 1553 K
  4. 2800 K

Correct Answer: A

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  2. Cosmology Physics tutorial: Stars. Read the Stars physics tutorial and build your physics knowledge of Cosmology
  3. Cosmology Revision Notes: Stars. Print the notes so you can revise the key points covered in the physics tutorial for Stars
  4. Check your calculations for Cosmology questions with our excellent Cosmology calculators which contain full equations and calculations clearly displayed line by line. See the Cosmology Calculators by iCalculator™ below.
  5. Continuing learning cosmology - read our next physics tutorial: Evolution of Stars

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