5 Written questions
5 Matching questions
- In 1670 Isaac Newton performed a critical experiment on the nature of light when he
- The best shape for the cross-section of a simple astronomical mirror in order to produce the sharpest images of very distant objects at its prime focus is a(n)
- In the 1860s, James Clerk Maxwell carried out important investigations on the nature of light when he
- The charged-coupled device, now used extensively for astronomical imaging, works on what principle?
- Refraction is the
- a parabolic shape.
- b Light generates electrical charge on a computer-readable multielement array of detectors.
- c bending of light as it enters a dense but transparent material at an angle to the perpendicular to the surface of the material.
- d demonstrated that white light was made up of colors that could be split by a prism and that these colors were not produced by the glass through which the light passed.
- e proved mathematically that light could b described by oscillating electric and magnetic fields.
5 Multiple choice questions
- number of protons in the atomic nucleus and hence its positive charge.
- temporary reversal of the planet's normal west-to-east motion past the background stars as seen from the Earth.
- path traced out by the Sun in our sky over one year against the background stars.
- time needed for half the radioactive atoms in the sample to decay.
- The star is moving rapidly away from Earth.
5 True/False questions
The Copernican system for planetary motion is → Sun-centered, with the planets moving in perfect circles around the Sun.
A perfect circle is an ellipse with an eccentricity of → zero.
Which of the following four objects or persons in NOT accelerating? → Olympic swimmer exerting considerable force to maintain a constant speed in a straight line through the water.
Are the constellations seasonal? → Yes, On a summer night many of the constellation you can see are different from the constellations you can see on a winter night. But there are some constellations you can see all year long.
A planet at inferior conjunction is always → Yes, On a summer night many of the constellation you can see are different from the constellations you can see on a winter night. But there are some constellations you can see all year long.