Light Questions

• As light from a star spreads out and weakens, do gaps form between the photons?
• Can air make shadows?
• Can humans ever directly see a photon?
• Can light bend around corners?
• Can momentum be hidden to human eyes like how kinetic energy can be hidden as heat?
• Can one bit of light bounce off another bit of light?
• Can radio antennas emit visible light?
• Can you make a shock wave of light by breaking the light barrier just like supersonic airplanes break the sound barrier?
• Can you make a sunset in a cup of milk?
• Do humans give off radiation?
• Does an atom have a color?
• Does the back of a rainbow look the same as its front side?
• Have astronomers ever observed a violet shift like they have blue shifts and red shifts?
• How bright is a laser beam when viewed from the side?
• How can a clear object be transparent and visible at the same time?
• How can glass produce glare without reflecting light?
• How did Archimedes use mirrors to burn up invaders' ships?
• How do projectors project the color black?
• How do space ships fly faster than light?
• How do tractor beams work?
• How do you focus regular light to make it a laser beam?
• How do you make a one-photon-thick beam of light?
• How does a black hole give off light?
• How does a photon accelerate to light speed so quickly?
• How does diffraction make a tree's shadow blurry?
• How does looking at distant galaxies allow us to look back in time?
• How does plasma make a campfire flame orange?
• Is a quadruple rainbow possible?
• Is light a particle or a wave?
• Is the reason that nothing can go faster than light because we have not tried hard enough?
• Is there a difference between thermal radiation and infrared radiation?
• Light has no mass so it also has no energy according to Einstein, but how can sunlight warm the earth without energy?
• Since a star's light takes so long to reach us, how do we know that the star is still there?
• What is the color of the sun?
• What is the speed of dark?
• What is the speed of gravity?
• What makes a "fluorescent" highlighter marker so bright?
• What makes heat rise?
• What makes the light waves in laser light parallel?
• What would happen if you drove your car close to the speed of light and turned on the headlights?
• When does a light beam have only a single frequency?
• When does light travel in a straight line?
• When I bump one end of a long metal bar, the other end instantaneously moves. Can I use this to send messages faster than light?
• When I sit by a campfire, how does its hot air heat me?
• Why are red, yellow, and blue the primary colors in painting but computer screens use red, green, and blue?
• Why are there only six fundamental colors: red, orange, yellow, green, blue, and violet?
• Why are veins blue?
• Why can't color blind people see any colors?
• Why can't flat lenses focus light?
• Why do camera flashes make your eyes turn red?
• Why do mirrors flip left to right and not up to down?
• Why does a person with only one working eye have zero depth perception?
• Why does a rainbow contain a pure spread of spectral colors?
• Why does a rainbow exist only in a narrow band?
• Why does my room get dark when I turn the lights off even if my window is shut?
• Why does water make a shirt darker?
• Why doesn't light carry momentum?
• Why doesn't the outside world appear blue even though so much light comes from the blue sky?
• Why is light pure energy?
• Why is the moon so bright?
• Why is the sky blue?
• Why is the sun cold in the winter?
• Why is time frozen from light's perspective?
• Why was color invented by humans?
• Will the night sky eventually end up completely black because the universe is expanding?