1. Applications of Quantum Mechanics: Laser Technology

2. Einstein theorized that electrons can be stimulated to a higher energy state and then release radiation when they return to ground state (Much like Bohr's theory) Theodore Maiman was the first physicist to display a working visible-light laser in 1960 (laser produced light from a ruby crystal)

4. A laser (light amplification by stimulated emission of radiation) produces an intense beam of a single colour Waves of a laser beam vibrate in the same direction at the same time As a result of that, laser beams can transfer a lot of energy

5. Classes of Lasers Image taken from https://web.stanford.edu/dept/EHS/prod/researchlab/radlaser/laser/procedures/classes.html

6. Electrons require a specific amount of energy from a photon of light to excite it to a higher energy level Once the electron begins to move back to it's ground state, it releases an equal amount of energy as a photon Some of the photons released by electrons collide with other atoms within the ruby crystal rod, which then causes the atoms to undergo the same process and release more photons (known as the amplification of photons)

7. Some of the photons travelling across the axis of the rod eventually exit through the 95% reflective mirror and form a laser beam These photons all possess the same wavelength and travel in parallel, continuous waves along the same path