Recent content by PaulMuaddid

A "shadow" counts as a separate shadow if it is from a different source OR if its gradient is different. We're only interested in shadows cast onto floor. There are three. I'm still not sure why shadow 2 and 3 are not completely canceled out. Shadow #2 is closer to left light source, so the...

There's a ceiling, it too is black and non-reflective. Floor is white and can receive cast shadows.

There is a floor, the shadow (whatever shadow that would be) would be cast on the floor.

Ok, how about this... Astronaut was holding ball, so ball was traveling with him. He release marble. The marble "continues" on it's path, thus it hangs in mid space? (from astronauts viewpoint) (we are in a vacuum, inside station, astronaut is wearing a suit).

In that case, from my viewpoint, the ball stays where it is, but from viewpoint of astronaut, the ball is moving in a counter clockwise path in air.

No light is scattered from walls, but the two point sources of light are generating light. (in other words, the walls do not enter equation)

(the space station is no where near a planet, so a planet does not affect situation)

I'm not even sure the ball drops. Let's say the astronaut is standing in a vacuum He let's go of ball. Does the ball drift off in a counter clockwise motion? (since the station is rotating in a clockwise motion). So the balls path draws out an inner circle in a counter clockwise...

You are facing "forward", so your left hand points in direction of motion. (qualified this, because "where" ball falls depends on how which way you are facing)

No it's not homework. It's just a riddle.

You're in a space station. It's shaped like inner tube of a tire. It's rotating, you're standing on the floor inside "inner tube" station. (the floor is the inside part of outer rim of tube) You are holding a marble, you are standing sideways with respect to rotation. (the space station is...

Almost... :smile: With answer comes another question, but there are more than 2 shadows.

You are in a dark room with no other sources of light The walls are painted black, so no light is scattered from walls You have two point sources of light of equal power + same height about ground They are 10 feet apart You stand a thick rod vertically in middle of two, and 4 feet in...