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6. A reflecting telescope uses:
- A parabolic concave mirror and a convex mirror
- A spherical concave mirror and a convex mirror
- A spherical convex mirror and two concave lenses
- A parabolic concave mirror and a spherical concave mirror
- Lots of mirrors
7. The resolving power of a telescope is:
- The smallest angle at which you can distinguish between the sun and the moon
- The smallest angle at which it can clearly define the edge of the object
- The biggest angle at which it can distinguish two points
- The smallest angle at which you can distinguish between two points
- The biggest angle at which it can clearly define the edge of the object
8. If a mirror in a reflecting telescope isn't quite ______, it will have spherical aberration.
- Flat
- Parabolic
- Round
- Sharp
- Spherical
9. What causes chromatic aberration?
- Tiny bubbles in the lenses
- The lens being too big
- The wrong shape of lens
- Different colours refracting by different amounts
- The lens being too small
10. Silicon is _______, which makes is useful in CCDs.
- A semiconductor
- A metal
- Artificial
- An insulator
- A gas
11. The quantum efficiency of CCDs is higher than that of photographic film.
12. Below the pixels are:
- Extra neutrons
- Potential wells
- Spectrum wells
- Photon wells
- Electromagnetic waves