Chapter 4.3 - Light Flashcards
Define Luminous
An object that releases or emits light
What is the name given to objects that do not produce their own lights
Non - Luminous
Define refractive index
Is the measure of how easily light travels through a substance.
Define reflection
Light bouncing off an object
Define the law of reflection
The angle the incident ray hits a surface is the same angle as the reflected ray leaves the surface.
What is the equation for the law of reflection
angle of incidence (i) = angle of reflection (r)
What is regular reflection
reflection from a very smooth surface ( forms a clear sharp image)
What is diffuse reflection
occurs from rough surfaces and no clear image is formed (example think of a choppy lake cant see reflection of mountains as surface is rough)
What is another name for a flat mirror
Plane Mirror
What is lateral inversion
your reflection in the mirror - sides are reversed
What is a concave lens what type of image does it produce
a lens that curves inwards. Produces a upright smaller virtual image
What is a convex lens and what type of image does it produce
a lens that bulges outwards. Produces an upright and enlarged virtual image.
Draw a figure showing the law of reflection
with the following labelled: mirror, incident ray, angle of incidence, normal, angle of reflection and the reflected ray.
figure 4.3.5
List the 5 properties of an image seen in a plane mirror
Upright, same size as object, is laterally inverted (flipped sideways), is virtual and appears to be located as far inside the mirror as the object is infront.
What is the focal length
in using a lens the focal length is the point at which distant light rays meet.
