I need two reasons why light is considered a wave.
The classical theories of light considered light as a stream of particles and or as waves depending on the phenomena being studied. Interference and diffraction are two phenomena that the corpuscular (particle) theory could not explain and the wave theory could. Quantum theory came up to explain the dualistic nature of light.
It is a transfer of energy over a medium. Not sure what to say for a second reason.
no one is wide-spread with what motives gravity in straightforward words that that is led to by technique of mass. in view that mild is seen both a particle and a wave i wager it ought to have some gravity even as that is a particle. If the solar were to dissapear all the planets ought to pass frying off. Earth no longer in straightforward words is inpacted by technique of gravity from the solar, yet by technique of each and every merchandise that has a mass. The moon bends the earth out of sort and a fashionable man or woman thousands and thousands of miles away nevertheless attracts earth, yet very insignificantly.
Group wave and wave function. Light consists of photons, which are particles, not waves. But photons travel in groups and form group waves. These are like ripples on top of a pond, where the water molecules are like the photons that form the light waves. Each photon also has a wave function. This is something like a probability distribution of its location and velocity. So each photon is smeared across time and space rather than actually being a precise point traveling at a precise velocity. Both wave types can be demonstrated by the so-called split slit experiment. In this we split a single source of light so it passes through two slits. The light is viewed on a screen where we see both constructive and destructive interference bands. And interference is a phenomenon of waves, not particles. We see these bands even if releasing one photon at a time. That results because of the wave functions. The constructive interference bands, the bright ones, in this case occur where photons are most likely to be (the expected value in a probability distribution). The destructive bands occur where the photons are least likely to be. There are your two reasons: constructive and destructive bands when groups of photons are passed through a double slit, indicating group waves, and similar bands when one photon at a time is passed through the slits, indicating wave functions.
