* No refraction: The light ray will continue traveling in a straight line without changing direction. This is because the angle of incidence and the angle of refraction are both 0 degrees.
* Change in speed: Even though the direction doesn't change, the speed of light will change as it enters the new medium. This is due to the difference in the index of refraction. The speed of light is inversely proportional to the index of refraction. So, if the index of refraction of the second medium is higher, the speed of light will be slower in that medium.
* Change in wavelength: The wavelength of light will also change as it enters the new medium. The relationship between wavelength and speed is given by the equation: speed = wavelength * frequency. Since the frequency of light remains constant, the wavelength changes proportionally to the speed.
* No change in frequency: The frequency of light remains constant as it travels from one medium to another. This is because frequency is a property of the light wave itself and does not depend on the medium it travels through.
In summary, when light travels from one medium to another at 0 degrees, it will experience a change in speed and wavelength but will not change its direction.
