user avatar
user avatar
user avatar
Carl Witthoft
  • Member for 8 years, 11 months
  • Last seen this week
40 votes

Why can't we see gases?

38 votes

What exactly is a dimension?

23 votes
Accepted

How do stars from far away affect Earth?

19 votes

Flat throw vs 45 degree throw of a ball

19 votes
Accepted

Why are the edges of the shadow so bright?

16 votes

Why is it impossible for the reactor of the nuclear power plant to turn into an explosive nuclear bomb?

15 votes
Accepted

Glass that only allows light of specific amplitude to pass through it

13 votes

Why does a human body only emit infra red radiation and not other types of electromagnetic radiation?

13 votes
Accepted

How can plasma torches reach $28000°\text{C}$?

11 votes

Why isn't it $E \approx 27.642 \times mc^2$?

11 votes

Can you find the length of a pencil without a ruler or clock?

10 votes

What is this wavy light coming through my blinds?

9 votes

Why is TV remote's infrared wave shown by a camera as purple light, why not red or something else?

9 votes

Why is acceleration expressed as m/s/s?

9 votes
Accepted

The effect of dark lines in the Sun's spectrum on reflected paint/ color

8 votes

Is it fair to judge this speedskating race by only 3 thousands of a second?

8 votes
Accepted

Is it possible to transfer light from edge to edge of transparent material?

7 votes

How much energy in form of heat does a human body emit?

7 votes

Why not just pump directly to the $3^\mathrm{rd}$ level directly in a $4$-level laser system?

7 votes

Why do we order the variables in certain physics questions the way we do?

7 votes

Can spectacles converge sunlight to an extent that it burns the eyeball?

7 votes

How can a bowling ball curve in both directions?

6 votes

Why is it more energy efficient to keep a certain temperature in my house (instead of stop heating)?

6 votes

Would you run faster on Mars?

6 votes

Does brightness of the light remains constant with the variation of the distance with respect to the source in vaccum?

6 votes

Why can't single LEDs produce white light directly?

6 votes
Accepted

Can you get a playground to swing from stationary?

6 votes

Does Light Experience Length Contraction?

6 votes
Accepted

Can one pump water without providing an external source of energy?

5 votes

If I were standing on the surface of the sun, how far could I see?

1
2 3 4 5
16