1. Wavelength (λ):
* Definition: The distance between two consecutive crests or troughs of a wave.
* Effect on Light:
* Color: Wavelength determines the color we perceive. Shorter wavelengths (like violet) appear blue, while longer wavelengths (like red) appear red. This is the basis of the visible spectrum.
* Energy: Shorter wavelengths have higher energy. This is why ultraviolet (UV) light can cause sunburns, while infrared (IR) light provides warmth.
* Example: Red light has a longer wavelength than blue light, meaning it carries less energy.
2. Frequency (f):
* Definition: The number of wave cycles passing a fixed point per second.
* Effect on Light:
* Energy: Frequency is directly proportional to energy. Higher frequency waves have more energy.
* Color: Similar to wavelength, frequency also influences color. Higher frequency waves appear blue, and lower frequency waves appear red.
* Example: Microwaves have a lower frequency than visible light, so they carry less energy.
3. Amplitude (A):
* Definition: The maximum displacement of a wave from its equilibrium position.
* Effect on Light:
* Brightness: Amplitude determines the intensity or brightness of light. A higher amplitude means a brighter light.
* Energy: While amplitude doesn't directly change the *type* of energy, it does affect the *amount* of energy carried by the wave. Higher amplitude waves carry more energy.
* Example: A flashlight with a larger battery will produce a higher amplitude light wave, resulting in a brighter beam.
Important Note: Wavelength and frequency are inversely proportional (λf = c, where c is the speed of light). This means that as one increases, the other decreases.
In Summary:
* Wavelength and frequency determine the *type* of wave (color of light, type of radiation).
* Amplitude determines the *intensity* or strength of the wave (brightness of light, loudness of sound).
By understanding the relationship between these properties, we can predict and explain various wave phenomena, from the colors of rainbows to the effects of different types of radiation.
