• What’s the difference between heat and temperature?
  Heat is molecules moving. It is a form of energy the combined energy ...

• How do you convert Fahrenheit to Celsius?
  You can convert from Fahrenheit to Celsius by subtracting 32 then ...

• How is temperature measured?
  Temperature is usually measured with a thermometer. Some thermometers ...

• How is light bent?
  Light rays are bent when they are refracted. This happens when they ...

• How do fiber optic cables bend light?
  Actually they don't bend light, but reflect it round comers. Inside a ...

• Why is the sun red?
  The sun is only red at sunrise and sunset, when the sun is low in the ...

• How do mirrors work?
  Most mirrors are made of ordinary glass, but the back is silvered ...

• Does light travel in waves?
  In the last century, most scientists believed light did travel in ...

• What are photons?
  Photons are almost infinitesimally small particles of light. They ...

• How do things absorb light?
  When light rays hit a surface, some bounce off, but others are ...