Curriculum
Course: Igcse Physics
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Curriculum

Igcse Physics

1. Motion, Forces and Energy

0/161 Dr Dabour Hub Science Diagram and Course Material

2. Thermal Physics

0/75 Dr Dabour Hub Science Diagram and Course Material

3. Waves

0/77 Dr Dabour Hub Science Diagram and Course Material

4. Electricity and Magnetism

0/119 Dr Dabour Hub Science Diagram and Course Material

5. Nuclear Physics

0/39 Dr Dabour Hub Science Diagram and Course Material

6. Space Physics

0/47 Dr Dabour Hub Science Diagram and Course Material
Quiz

6.2.5 Galactic Redshift – Check yourself

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1.
Light from a galaxy moving away from us is…
Blueshifted
Unchanged
Absorbed
Redshifted
2.
What does redshift of distant galaxies tell us?
The Universe is contracting
The Universe is expanding
The Sun is hot
Galaxies are red
3.
Which is true of galaxies further away?
They move more slowly
They are not moving
They move away at a higher speed
They are blueshifted
4.
A galaxy is 1.0 × 10²³ m away. Using H₀ = 2.2 × 10⁻¹⁸ s⁻¹, what is its speed of recession?
2.2 × 10⁵ m/s
2.2 × 10⁴ m/s
2.2 × 10⁶ m/s
4.5 × 10⁴ m/s
5.
The Hubble constant has the unit…
m/s
s⁻¹
m
m s²
6.
The wavelength of a line is longer than its laboratory value. The source is…
Approaching
At rest
Cooling
Receding
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