Waves

Waves

1. Light

   • Light rays can be reflected on a mirror by having a incident ray hit a flat plane which angle is the same as the reflected ray when marked at the normal.
   • Light can refract through glass blocks but when the ray enters the block, it slows down making it closer to the normal line and speeds up when exiting the block going away from the normal.
   • The speed of light changes based on the material it travels through so for example, light in the air travels 300,000,000m/s, in water it goes 225,000,000m/s and in glass it travels 200,000,000m/s
   • Dispersion of light is when white light travels through a prism which allows us to see the colour spectrum which contains the colours red, orange, yellow, green, blue, indigo and violet in that order from fastest to slowest as red has the longest wavelength so it is refracted the least and violet is the slowest so it is refracted the most.

2. Electromagnetic Waves

   • Can travel at the same speed in a vacuum and are transverse which move 90 degrees in the direction of the vibrations.
   • They also carry energy, be refracted and be reflected like other waves.
   • EM waves is radioactive so it is actually gamma rays, x-rays, ultraviolet, visible light, infrared, microwaves and radio waves.