Why is the bending of light due to gravity observable in real life? While it is true that photons have no mass, it is also true that we see light bend around sources with high mass due to gravity. This is...
What is not impacted by gravity? Mental concepts such as history, misinformation, love, sorrow are about the only things not affected by gravity. But pretty much everything else is, even light and time. Einstein rings allow us to directly observe the...
Does gravity affects the speed of light? Yes, light is affected by gravity, but not in its speed. General Relativity (our best guess as to how the Universe works) gives two effects of gravity onlight. It can bend light (which includeseffects...
How can light have energy but no mass? In addition to being a particle, light is also a wave. This allows it to carry momentum, and therefore energy, without having mass. Does light have weight? We can only escape this paradox...
Why is light affected by gravity if it has no mass? While it is true that photons have no mass, it is also true that we see light bend around sources with high mass due to gravity. This is not because...
Why does light go into black holes if it has no mass? However, matter that is near a black hole can give off light in response to the black hole’s gravity. A black hole is a region of space where gravity...
What happens to wave when it is reflected? Reflection involves a change in direction of waves when they bounce off a barrier. Refraction of waves involves a change in the direction of waves as they pass from one medium to another....
Does reflection affect speed? Figure 1: When a wave is reflected, the incident angle i,i is equal to the reflected angle r,r. While the wave direction changes, the wave speed, wavelength and frequency remain the same. Does velocity change after reflection?...
Does light change color on refraction? When light refracts from a medium to a second one, its frequency stays the same, and its wavelength changes. If this is true, why we see the refracted light ray’s colour is the same as...
What does refraction not change? Frequency of light does not change on refraction , When a ray of light passes from one medium to another, its direction (or path) changes because of change in speed of light from one medium to...