How light travels

• Light is a form of electromagnetic radiation, with a range of wavelengths that correspond to visible light.
• Waves travel through space at the speed of light, but they slow down when passing through matter due to interactions with atoms or molecules.
• Visible light has a wavelength between approximately 400 nanometers (violet) and 750 nanometers (red).
• The human eye can only detect certain wavelengths within the visible spectrum, which are perceived as different colors.
• When light passes from one transparent substance into another with different refractive indices, it bends at an angle called the critical angle.
• When light passes from one medium to another with different refractive indices, it changes direction at an angle called the critical angle.
• Light can travel through space without any medium or material to support it.
• Light can travel through space without being absorbed or scattered by matter.
• Light can behave as a wave or a particle (photon).
• The speed of light is constant, regardless of the observer's motion.
• The refractive index (n) of an object determines how much it slows down light as it passes through it.
• When light enters a new medium, its path changes based on the difference between the speeds of light in the two media.
• The human eye can only detect this narrow band of colors within the spectrum of light.