3270084
Description
Flashcards by laura.scottt, updated more than 1 year ago
|
Created by laura.scottt
over 9 years ago
|
|
| Question | Answer |
| angle of incidence = angle of reflection | |
| 1/di +1/do = 1/f m = di/do = hi/ho | image distance + = image real image distance - = image virtual image enraged or diminished |
| Concave mirror produces... | real image when rays converge (can be focused) virtual image when rays diverge (can't be projected) |
| Convex mirror always produces... | image that is - virtual - behind mirror - between F and mirror (diverging mirror - focal point is ALWAYS NEGATIVE) |
| Concave mirror O - center O - c O - parallel O - axis O - centre - under O | |
| Convex mirror O - parallel - F O - C | |
| Refraction - bending of light as passes from materials into another | LRI into HRI - bends towards normal HRI into LRI - bends away from normal |
| Light travels at different speeds in different mediums 1n2 = C1/C2 | C1 = light speed in m1 C2 = light speed in m2 1n2 = refractive index for light traveling from m1 to m2 |
| In vacuum - no air - n = 1 1n2 = n2/n1 | 1n2 = refractive index for light traveling from m1 to m2 n2 = m light traveling into n1 = m light traveling out of |
| Snells Law sinθ1/sinθ2 = 1n2 or sinθ1/sinθ2 = n2/n1 or n1sinθ1 = n2sinθ2 | θ1 = angle of incidence θ2 = angle of refraction 1n2 - refractive index for light traveling from m1 to m2 |
| Total internal reflection Past the critical angle, all light reflects off the boundary (from dense to less dense medium) θc = sin-1(n2/n1) | Critical angle angle of incidence which provides an angle of refraction of 90° θc = critical angle n2 = m light traveling into n1 - m travling out of |
| Convex lenses outside focal point (real and inverted image) O - P - f O - C O - F - P | |
| Convex lenses inside focal point (virtual and upright image) P - f O - c | |
| Concave lenses (virtual, upright, diminished) O - P - F O - C | |
| Waves V = F λ | λ = Wavelength = distance between crests V = wave velocity ms-1 F = frequency (Hz) = waves per second |
| Transverse - vibrate at right angles to direction of wave movement (water waves) | |
| Longitudinal - vibrate in same direction as direction of wave movement (sound waves) | |
| Pulse of string Fixed boundary - inverted, same amplitude | loose boundary - upright, same amplitude |
| Pulse enters denser/slower medium Reflected pulse - inverted, smaller amplitude, same wave length Transmitted pulse - smaller amplitude, shorter wavelength | |
| Pulse enters less dense/ faster medium Reflected pulse - upright, smaller amplitude, same wavelength Transmitted pulse - bigger amplitude, longer wavelength | |
| Constructive interference crest meets crest trough meets trough forms double amplitude | |
| Deconstructive interference crest meets trough (of equal amplitude) two waves cancel each other out | |
| Waves from point move outwards in circles waves from a straight line move away in straight lines | the wave front is perpendicular to the direction of traveling wave |
| Water waves - deep to shallow - shorter wavelength and slower velocity sinθ1/sinθ1 = V1/V2 = λ1/λ2 = n1/n2 | Shallow to deep: direction of wave movement will bend towards boundary (away from normal) Deep to shallow: direction bend towards normal |
| Standing waves - series of incident waves interact. Reflecting wave off closed boundary | Both waves travel in opposite direction at same speed and wavelength |
| anti node & anti nodal lines = crest + trough arrive in phase & constructive interference | Node & nodal lines = crest + crest = trough + trough arrive out of phase & destructive interference |
| Diffraction - bending of waves around the edges of an object | lower frequency or long wavelength diffract best sound = longer wavelength and lower frequency than light so diffracts better |
| Diffraction through slit | Waves diffract best when gap = same distance or smaller than wavelength High frequency/short wavelength don't diffract much Low frequency/long wavelength diffract more |
| Wave interference - waves from 2 sources add together to form interference pattern of nodes and antinodes | Anti nodal lines are numbered Central line: n = 0 increasing spacing between sources, anti nodal line increase & spacing decrease |
| Path difference difference of the distance a point is away from source 1 and source 2 | Relate this to numb of wavelength sad the antipodal line number A point on anti nodal line n=0, distance to each source is same A point on anti nodal like n=1, path difference is 1 wavelength |
Want to create your own Flashcards for free with GoConqr? Learn more.