1. Light is made of photons: Light is made up of tiny packets of energy called photons. These photons act like tiny particles, even though they also exhibit wave-like properties.
2. Photons carry momentum: Just like any moving particle, photons carry momentum. Momentum is a measure of an object's mass and velocity.
3. Photons can transfer momentum: When a photon hits a surface, it can transfer its momentum to the surface. This transfer of momentum creates a tiny force, known as light pressure.
4. Light pressure can move objects: Although light pressure is incredibly weak, it can still exert enough force to move objects, especially tiny ones. This is how solar sails work. Solar sails are large, reflective sheets that are propelled through space by the pressure of sunlight.
5. Light pressure is used in research: Scientists are using light pressure to manipulate tiny objects like nanoparticles and even to create new types of lasers.
It's important to remember: Light pressure is extremely weak. While it can move microscopic objects and even propel spacecraft, it's not going to be pushing your furniture around anytime soon.
