Light, Sound & Optics

Question 1

Photon energy

Answer 1

E = hf

Question 2

600nm

Answer 2

Visible spectrum appearing orange

Question 3

Snell’s law

Answer 3

N1sin01 = n2sin02, meaning if n1 > n2, sin02 > sin01

Question 4

380 - 450nm

Answer 4

Corresponds to violet light

Question 5

500 - 565nm

Answer 5

Green light

Question 6

565 - 590nm

Answer 6

Yellow light

Question 7

625 - 700nm

Answer 7

Red light

Question 8

Total internal reflection

Answer 8

Where light moves from a medium with a higher refractive index to a medium with a lower refractive index, the angle of refraction will initially increase as the angle of incident light increases, until it approaches 90 degrees at the critical angle

Question 9

Speed of light in a given material (n)

Answer 9

N = c/v
C = 3.0 x 10^8 m/s

Question 10

Dangerous levels of rays on a spectrum

Answer 10

Middle of the spectrum: not so dangerous
Towards the left end (200nm): very dangerous (more effective)

Question 11

Under which of the following conditions would someone produce the most vitamin D3?

Answer 11

Low epidermal melanin concentrations and exposure to 320nm light

Question 12

Electromagnetic spectrum

Answer 12

Radio waves - smallest Hz and longest wavelengths
AM radio waves have lower Hz than FM radio waves
Gamma rays have shorter wavelengths than those of radio waves

Question 13

Long wavelength photons have

Answer 13

Lower energies than short wavelength photons

Question 14

Energy relationship

Answer 14

Energy is proportional to Hz, and Hz is inversely proportional to wavelength, energy is inversely proportional to wavelength