Chapter P14- Light Flashcards
What surfaces will emit and absorb infrared radiation best?
What surfaces will emit and absorb infrared radiation worst?
What do all waves do?
What does the angle of incidence equal?
What happens when a light ray goes from air to glass?
What happens when a light ray goes from glass to air?
When can reflection and refraction sometimes occur?
What happens when light refracts through a prism and what is the result?
What happens as you go from the violet end of the visible light spectrum to the red end of the scale?
What are the seven parts of visible light in order?
What two things do coloured surfaces do?
What determines the colour we see?
Matte black
Shiny white surfaces
Reflect
The angle of reflection
It changes direction towards the normal
It changes direction away from the normal
When light meets a boundary between two materials
It spreads out the different wavelengths so you can see the colours of the rainbow
The wavelength increases
Violet, indigo, blue, green, yellow, orange, red
Reflect some colours and absorb others
The colours that are reflected.
What two things do filters do?
What do transparent objects do to light?
What do translucent objects do to light but what two things happen to the light?
What do opaque objects do to light and what three things can instead happen to the light?
What do convex lenses do?
What is another name for convex lens?
What is the principle focus?
What two things can the image produced by a convex lens be?
What is the focal length?
Transmit certain colours of light and absorb other colours
Transmit all of the light that enters it
Let light travel through them but the light is scattered or refracted
Don’t let light through them. The light is either reflected/scattered at the surface or absorbed
Make parallel rays converge to a focus
Converging lens
The point the lines converge to
Real or virtual
The distance from the lens to the principle focus.
What do concave lens do?
What is another name for concave lens?
Where do the rays appear to come from to an observer?
What is this known as?
What is the image produced by a concave lens always?
What is the equation to calculate the magnification produced by a lens?
What are the following rays in a lens diagram:
Parallel
Focal
Centre
Make parallel rays spread out
Diverging lens
A point from behind the lens
The principle of focus
Virtual
Magnification= Image height -:- Object height
A ray parallel to the optical axis passes through the focal point on the other side of the lens
A ray that passes through the focal point emerges parallel to the optical axis on the other side of the lens
A ray that passes through the centre of the lens continues with no change in direction.
