Compound Microscope: Jack and Mary view the same microorganism through the same compound microscope. Mary's near point distance, NM, is twice as large as Jack's near point distance, NJ. If Mary sees the microorganism with magnification MM, with what magnification does Jack see it?
A. 2 MM
B. MM/2
C. 4 MM
D. MM/4
E. 8 MM
Answer: B
You might also like to view...
Buoyancy: A piece of wood is floating in a bathtub. A second piece of wood sits on top of the first piece, and does not touch the water. If the top piece is taken off and placed in the water, what happens to the water level in the tub?
A. It goes up. B. It goes down. C. It does not change. D. It cannot be determined without knowing the volumes of the two pieces of wood.
Two stars both have parallaxes of 0.023", but star A has apparent magnitude +2.3, while star B is magnitude +7.3. Which statement is true?
A) Star B must be ten times more luminous. B) Star A is both 100× brighter and larger than star B. C) Star A is both 100× brighter and more luminous than star B. D) Star A must be ten times closer. E) Nothing, since we do not know their absolute magnitudes.
What is the approximate mass-to-light ratio for the inner region of the Milky Way Galaxy, in units of solar masses per solar luminosity?
A) 1000 B) 600 C) 100 D) 6 E) 0.1
What is the significance of the Planck time?
A) It is the amount of time required for two protons to fuse to make deuterium. B) It is the time at which inflation is thought to have occurred. C) It is the time when the cosmic microwave background was released. D) Before it, conditions were so extreme that our current understanding of physics is insufficient to predict what might have occurred.