Waves

Question 1

Transverse wave

Answer 1

Direction of oscillation is perpendicular to direction wave is travelling

Question 2

Longitudinal wave

Answer 2

Direction of oscillation is parallel to direction wave is travelling

Question 3

Zero Order Line

Answer 3

n = 0 on diffraction grating

Question 4

How crystallography works

Answer 4

1) X-rays shone through crystal
2) Wavelength of X-rays similar to spacing between atoms in crystal structure, so diffraction pattern in produced
3) S can be determined using diffraction grating equation

Question 5

How to determine star composition using diffraction grating

Answer 5

1) Light from star passes through diffraction grating and is projected on screen
2) Black lines show wavelength of light absorbed by star, so can determine what elements are in star

Question 6

Refractive index

Answer 6

Ratio between c in vacuum and c in material

Question 7

Relative Refractive Index

Answer 7

The ratio of c in material 1 to the speed of light in material 2