Mc chpt. 21
Terms
undefined, object
copy deck
- An object that emits light is said to be
- luminous
- Light is believed to be produced by the sun by
- physical changes
- The corpuscular theory of light was proposed by
- Newton
- The theory of light proposed by Christian Huygens is known as the
- wave theory
- When light waves interfere with each other
- alternate bright and dark bands of light are produced
- James Maxwell proposed that light
- has electrical and magnetic properties
- According to the quantum theory of light, the seperate packets of energy by which light waves are called
- photons
- The theory of light most universally accepted today is the
- quantum theory
- Objects that block all light is said to be
- opaque
- An example of a transluscent substance is
- frosted glass
- Light travels in
- straight lines
- In a pinhole camera, the imge formed on the film is
- inverted
- The blocking of light produces
- shadows
- The lighter fringe of a shadow is called the
- penumbra
- When light strikes the an opaque object it is generally
- absorbed
- When light energy is absobred by a dark object is it is generally changed to
- heat energy
- A light ray that strikes a reflecting surface is said to be
- an incident ray
- Reflection from a rough surface is said to be
- diffuse
- Compared to the object , the image produced by the object in a plane mirror is
- the same size
- If you stand at a distance of 1 meter from a mirror, your image in the mirror appears to be
- 1 meter behind the mirror
- Light travels as a
- traverse wave
- The blocking of light by special filters is called
- polarization
- The scientist who first measured the speed of light was
- Roemer
- The speed of light is approximately
- 186,000 miles per second
- The darker inner part of a shadow is known as the
- umbra