How Light Travels Through Space
A clear explainer on how light travels through space, why it does not need air, what photons are, and why distant light lets us look into the past.
A clear explainer on how light travels through space, why it does not need air, what photons are, and why distant light lets us look into the past.
A simple explainer on the speed of light, why it is a universal constant, how fast it is, and why it matters for relativity, astronomy and technology.
A simple explainer on the electromagnetic spectrum, including radio waves, microwaves, infrared, visible light, ultraviolet, X rays and gamma rays.
A simple science explainer on holograms, interference patterns, lasers, 3D light images, and why many stage holograms are not true holograms.