speed of light

Speed of light

The speed of light is extremely fast; exact measurements reveal its finite speed.

Wavelength and frequency relationship

Shorter wavelength means higher frequency and more energy; longer wavelength means lower frequency and less energy.

Blue light vs Red light

Blue light has more energy than red light due to its shorter wavelength.

Ultraviolet light vs Infrared light

Ultraviolet light has more energy than infrared light.

White light

White light is a mixture of different colors, commonly represented as ROYGBIV.

Doppler effect

The change in frequency of a wave in relation to an observer moving relative to the wave source.

Higher frequency

A sound source coming towards the observer will result in a higher frequency sound.

Temperature

Temperature is a measure of the average internal energy and average speed of particles in a system.

Kelvin scale

A temperature scale where 0 K is absolute zero, and it measures the internal energy based on atomic and molecular motion.

Water freezing point on Kelvin scale

Water freezes at 273.15 K.

Water boiling point on Kelvin scale

Water boils at 373.15 K.