Lights/Optics Flashcards
It looks like a lot of questions, but it's mostly one sentence answers
What is colorblind?
When cells are unable to detect certain, or any, colours
What do cones do?
Detect colour
What do rods do?
Detect the presence of light
What is light and energy?
Light is a form of energy we can see.
Remember that energy is NOT matter so it is not made of particles.
Energy cannot be created or destroyed - it can only be transferred OR transformed.
What does emit mean?
Means to send out light typically in a ray fashion
What happens when light is absorbed by a surface?
It can also be transformed into other forms of energy including thermal, electrical or chemical energy.
What is opaque?
Lets no light pass through and forms a shadow
What is translucent?
Lets only some light go through (not all) and forms a shadow that is very light and no image is visible
What is transparent?
Lets light pass through with no shadows formed
What is reflection?
The process where light is bounced off of a surface.
Reflection is the reason we can see anything!
What is the incident ray?
Comes from the light source and hits the surface.
What is the reflected ray?
Bounces off the surface
What is the normal line?
90 degree angle to the reflecting surface at the incident ray interface
What is the angle of incidence?
Angle between the normal line and the incident ray
What is the angle of reflection?
Angle between the normal line and the reflected ray
