Question

Reposting I messed up on the last one.

Can you guys help me solve question 3?

Answer 1

Answer:

A light wave with a wavelength of 612 nm in a vacuum travels through a bit of fused quartz which has an index of refraction of n =1.458.

Answer 2

1.Laser lighting display- Laser beams are often used for visual effects, often in combination with music.

2.A light beam or beam of light is a directional projection of light energy radiating from a light source. Sunlight forms a light beam (a sunbeam) when filtered through media such as clouds, foliage, or windows. To artificially produce a light beam, a lamp and a parabolic reflector is used in many lighting devices such as spotlights, car headlights, PAR Cans and LED housings. Light from certain types of laser has the smallest possible beam divergence.