* Refraction: Light bends as it passes from one medium to another (in this case, from air to glass). This bending is called refraction.
* Speed of Light: The speed of light is slower in denser mediums like glass compared to air.
* Relationship between Wavelength, Speed, and Frequency: The speed of light (v), wavelength (λ), and frequency (f) are related by the equation:
* v = fλ
Since the frequency of light remains constant as it travels from one medium to another, a decrease in speed (v) leads to a decrease in wavelength (λ).
In summary: When light enters a glass slab from air, its speed decreases, causing its wavelength to decrease as well.
