Gr 10 optics Flashcards
(27 cards)
Incandesence
glows at high temp, Coal, FIre
Electric discharge
Electricity moving not through a metal
Lighting
Phosphoresence
Takes in light and releases it much slower
Glow in teh dark toys
Flourescence
The ability of certain chemicals to give off visible light after absorbing radiation which is not normally visible
Long light in class.
Chemiluminescence
term for light that is generated as a product of a chemical reaction
Glow sicks
Triboluminescence
Triboluminescence is a type of luminescence where a material produces light from friction, crushing, or other tearing
the glow producing by crushing sugar or rubbing quartz pieces together
Light-Emitting Diode
a semiconductor device that emits light when an electric current is passed through it.
LED
Order of the electromagnetic spectrum
Gamma rays, X-rays, Ultraviolet, Visible light(ROYGBIV), infared, microwaves, radiowave
What are the laws of reflection
the angle of reflection is equal to the angle of incidence, also the incident ray, the reflected ray, and the normal to the surface all lie in the same plane.
Define reflection
the throwing back by a body or surface of light, heat, or sound without absorbing it.
Applications of Plain, concave and convex mirrors.
concave mirror is used as a reflector in torches, searchlights, and car headlights, and among other things.
convex mirror is used as a rear-view mirror in automobiles.
Dentist mirrors
What does it mean when Di is positive vs negative
di is positive if the image is on the side opposite the object (i.e., real image); otherwise, di is negative (i.e., virtual image)
What does it mean when Hi is positive vs negative
hi is positive if upright, negative if inverted.
What does it mean when F is positive vs negative
For converging lenses, the focal length is always positive, while diverging lenses always have negative focal lengths.
Formula for magnification
M=Hi/Ho=-Di/Do
Formula for F
1/do + 1/di = 1/f
Define refraction
Light being deflected through a medium from another medium.
What is snell’s law
N1Sin01=n2sin02
Does a higher index of refraction mean it refracts more or less
Refracts more.
Does light refract away or closer to the normal when going from lower index of refraction to higher index of refraction
Towards the normal.
what causes light to speed up and slow down in diffrent matterials
The greater the refractive index, the slower light travels through the material
How to solve for N
N=C/V
why are there 2 focal lengths in a lens but one in a mirror
A lens has two focal points, because a lens has two refracting surfaces. A mirror has only one reflecting surface and hence, it has only one focal point.
Identify: Principle axis, axis of symmetry (normal), focal points (principle focal point and secondary focal point), focal
length, optical center.
PA is the line in the middle(Horizontal)
AOS is perpendicualr to the Mirror(Normal)
Focal point is F
Focal length is The distance between the focus and the optical center
Optical center is v
