You saw waves on a spring, both transverse and longitudinal. You also saw wave pulses on the wave machine. First we used the wave demonstrator to show reflections from a free end and from a fixed end. In that case there is both reflection and transmission. In other words, an upward incident pulse is reflected as an upward pulse.
Light is a transverse wave.
There is a traveling, oscillating electric field that is the light wave and this field is transverse to the direction the wave is propagating. The equation above is a key to all wave motion. As the light passes from one material to another, the wave speed can change but the frequency always remains constant. As the temperature increases the wavelength of the maximum radiation shifts to shorter wavelengths. You saw this effect with a light bulb as the applied voltage was changed.