P5: Light and Reflection Flashcards
What is a light source?
Something that emits light
How does light reach our eyes from a book?
It reflects from the page into our eye
A luminous object ______ light
gives out
Objects that transmit light are called?
Transparent
Light does not transmit through __________ materials.
opaque
Light can travel through translucent materials (like tracing paper) but it is ___________.
scattered
We see non luminous objects because they __________ light.
reflect
The speed of light is?
300,000 km/s
Light can travel through empty space, which is called a …
vacuum.
The formation of shadows shows that light has which 2 properties?
- It can not pass through opaque objects
- It travels in straight lines (It can’t bend round the object)
The image in a plane mirror is the ________ _________ behind the mirror as the object
same distance
The ray that hits a mirror is called?
The incident ray
The ray that reflects from a mirror is called?
The reflected ray
The imaginary line at 90o to the mirror is called?
The Normal
The angle between the incident ray and the normal is called?
The angle of incidence
