Physics Flashcards
Ace the exam!!
Order the electromagnetic spectrum
Radio Waves, Microwaves, Infrared, Visible Light, Ultra violet, X-rays, Gamma rays
What speed does light travel at
3.00 X 10^8 m/8
Plane mirrors are ____.
flat
Why are concave mirrors known as converging?
Because all light rays come together when light strikes the mirror.
What is visible light?
Electromagnetic waves that the human eye can detect.
What is the SALT in plane mirrors?
Size: The same size as the object
Attitude: Upright
Location: Behind the mirror
Type: Virtual
What are electromagnetic spectrum arranged by?
Wavelength and frequencies
What are convex mirrors
the outer reflective surface of a curved mirror
What kind of WL have high frequency and high energy
short wl
In what order do the wavelength of colors go in
longest to smallest
What happens in opaque surfaces?
Object does not transmit the incident light — it is either absorbed or reflected
Name the main parts of a diagram of reflection in plane mirrors and explain each
- Incident ray
- ray of light that travels at a reflecting surface. - Reflected Ray
- ray of light that bounces off a reflecting surface. - The Normal
- Line drawn in the middle to help measure angles. - Point of Incidence
- Spot where incident ray strikes reflecting surface. - Angle of incidence
- angle between the incident ray and the normal. - Angle of reflection
- angle between the reflected ray and the normal.
What are the eight sources of light - list them and explain how each one works with one example
- Incandescent light
- heating up something to light it EX: lightbulb - Electrical discharge
- thin glass tubes that contain gas and light when electricity passes EX: Neon signs - Fluorescent light
- A tube with gases that heat due to phosphor coating being exposed to UV light - Phosphorescent
- Glow after absorbing light from a source and emitting after a while - chemiluminescence
- Light produced from a chemical reaction - Bioluminescent
- An animal or plant that can produce their own light - Tribolouminescence
- Light produced from friction - Light-emitting-diodes (LED)
- Work from electric current and movement of electrons
What hand motion can I use on the test to remember a concave mirror
A hand ball earth with wrists touching each other
What happens in specular reflection?
All reflected rays bounce off at the same angle because of a smooth surface.
What order do the Electromagnetic wl go from?
longest to shortest
What are some examples of convex mirrors
Side-view car mirrors
security mirrors in parking lots, stores
What hand motion can I use to remember convex mirrors on the exam
both knuckles touching each other with fingers pointing outwards
What are the properties of light?
- Light travels in a straight line
- Light travels very fast
- Light travels like a wave
What is a concave mirror also known as?
Converging mirror
What are convex mirrors also called
diverging mirrors
What is incident light?
Light that hits an object/surface
What happens when white light is passed through a prism
it breaks off into all the ROYGBIV colors
What is a wavelength?
Distance from a peak to a peak or trough to a trough
What is a concave mirror?
the inner reflective surface of a curved mirror
What happens in diffuse reflection?
All light is reflected in different directions due to an irregular/bumpy surface.
What kind of WL has low frequency and low energy?
long wl
How is white light made
When all the ROYGBIV colors are combined
What are some examples of concave mirrors?
Car headlights
Magnified makeup mirrors
What are the 2 laws of reflection
1/ angle of I = Angle of R
2/ The i.r, r.r and normal all lie in the same plane flat to each other
What are the high points of a wavelength
Peaks
What are the low points of W.L
troughs
What are the two types of reflection
Regular - specular
Diffuse
Colors in the E.Spectrum in visible light
ROYGBIV
What happens in translucent surfaces
object transmits some of the incident light and reflects the rest back
What happens in transparent surfaces
object transmits all incident light
what is the difference between luminous and non-luminous light?
Luminous: can make its own light
Non-luminous: can’t make its own light