Poke a pinhole in a piece of card and hold it in sunlight and an image of the Sun is cast on the floor. The Sun-image diameter depends on the height of the pinhole above the floor

Measurements for all heights show the Sun-image diameter is about 1/100 the distance between the pinhole and the floor. This means that
A) about 100 end-to-end Sun images would fit between the pinhole and the floor.
B) distance-wise, the Sun is about 100 Suns away from Earth.
C) both of these
D) none of the above


Answer: C

Physics & Space Science

You might also like to view...

In Part A, you found that Planet Z should not have polar ice caps or liquid water. What single change to Planet Z's characteristics would allow it to have these things?

a. a larger size b. a larger axis tilt c. a greater distance from its star d. a smaller size

Physics & Space Science

Together which two gases make up 99% of Jupiter's atmosphere?

A) Ammonia and methane B) Water vapor and methane C) Helium and ammonia D) Hydrogen and ammonia E) Hydrogen and helium

Physics & Space Science

The largest plutons are called ______________

Fill in the blank(s) with correct word

Physics & Space Science

All real engines are less efficient than the Carnot engine because

a. they do not operate through the Otto cycle. b. they do not operate through a reversible cycle. c. the working substance does not maintain a constant volume through the cycle. d. the working substance does not maintain a constant pressure through the cycle. e. the working substance does not maintain a constant temperature through the cycle.

Physics & Space Science