Light
What is Light?
Light is electromagnetic radiation that you can see
What does translucent mean
A material that allows most of the light that strikes it to pass through but the objects appear blurry
What is regular reflection?
Reflection of light from a smooth, shiny surface
A transparent object with at least one curved side that causes light to change direction
How many Rod cells are in the human retina
100 million
What is radiant energy
the energy carried by an electromagnetic wave
What does opaque mean
A material through which light does not pass through
Reflection of light from a rough surface is called
Diffuse reflection
A lens that is thicker in the middle than at the edges is a
Convex lens
How many cone cells are found in the retina
6 million
A material that allows almost all of the light to pass through is called what
Transparent
Bouncing of a wave off of a surface is called what
Reflection
The change in direction of a wave as it changes speed while moving from one medium to another
Refraction
A lens that is thicker at the edges than in the middle is a
Concave lens
True or False: When light waves of different wavelengths interact with an object, the object absorbs some light waves and reflects others
True
A purple neon sign emits light waves with what wavelength
Purple wavelengths (visible light)
An apple looks red because it absorbs what colour light
Red
On a calm day you can see your reflection in a pond. On a windy day you cannot because the surface is____ resulting in ____ reflection
Rough, diffuse
True
True or False: Colors of pigment combine by adding wavelengths. Colors of light combine by subtracting wavelengths
False
What is the only light that you can see with your eyes?
Visible light
What is the law of reflection?
when a wave is reflected from a surface, the angle of reflection is equal to the angle of incidence
Light travels through empty space at at the same speed
300,000 km/s
Light bends as it passes from air into glass at an angle due to
Refraction
True or False: Light travels faster in a vacuum than it does in oil
True