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Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
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22.4 | Stars |
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?
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.
Correct Answer: C
3. What is the surface temperature of a blue-colour star? Take the wavelength of blue colour equal to 450 nm.
Correct Answer: A
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