* Speed of Light Changes: Light travels slower in denser mediums like glass compared to air. This is because the light interacts with the atoms in the material, causing it to slow down.
* Frequency Remains Constant: The frequency of light (the number of wave crests passing a point per second) is determined by the source of the light and remains constant as it travels from one medium to another.
* Wavelength and Speed Relationship: The speed of light (v), wavelength (λ), and frequency (f) are related by the equation: v = fλ. Since the frequency remains constant and the speed decreases, the wavelength must also decrease to maintain this relationship.
In summary: The wavelength of light decreases when it enters glass from air because the speed of light decreases in the denser medium while the frequency remains constant.
