Chapter 3: Introduction to Optics

Question 1

What is Light considered to be: a wave or a particle?

Answer 1

Technically both. It had qualities of both a wave and particle.

Question 2

What does it mean by monochromatic?

Answer 2

One wavelength

Question 3

Example of monochromatic

Answer 3

LED Bulbs

Question 4

Polarization

Answer 4

Direction of time-varying electric field component of light.

Question 5

How do Polarized lenses work?

Answer 5

They prevent light glare from hitting you directly in the eye. These lenses block light.

Question 6

When does diffraction occur?

Answer 6

Diffraction occurs because of path difference as the wave front moves through the opening causing interference.

Question 7

Scattering

Answer 7

Light interacts with particles (size close to the wavelength) and the direction the light is traveling is changed.

Question 8

Rayleigh Scattering

Answer 8

This is elastic (no energy change).

Question 9

Raman Scattering

Answer 9

This is inelastic (change of energy and direction).

Question 10

What does the Index of Refraction depend on?

Answer 10

Wavelength

Question 11

Spherical Aberration

Answer 11

Rays strike lens on different spots.

Question 12

Chromatic Caberation

Answer 12

Dependence on medium.

Question 13

Monochromaters

Answer 13

-Used for spectral scanning
-Rotate grating, move wavelength along focal plane/exit slit.

Question 14

What are the two types of monochromaters?

Answer 14

-Prism
-Grating

Question 15

What are the three filters?

Answer 15

-Interference
-Colored Glass
-Holographic Notch Filter

Question 16

Interference Filter

Answer 16

Used to reject or pass bands of light.

Question 17

Colored Glass Filter

Answer 17

80% of light is passed/rejected.

Question 18

Holographic Notch Filter

Answer 18

Designed to block a specific wavelength narrower and higher than the interference filter.