Light, Shadows, Rainbows Misconceptions

Concepts

Light (See also - Three diagrams and study summary)

Misconceptions

• Reflected light is shine or glare not something associated with seeing objects.
• Light can only do some of the following: be absorbed, blocked, reflected, or refracted by an object.
• Light is not reflected in a predictable manner and angle.
• Light is not refracted in a predictable manner and angle.
• The reflection of an object is located on the surface of the mirror.  The reflection is often thought of as a picture on a flat or curved surface. 
• To be seen in a mirror, the object must be directly in front of the mirror or within the line-of-sight from the observer to the mirror.
• Light always passes straight through transparent material (without changing direction).
• When an object is viewed through a transparent material, the object is seen exactly where it is located.
• Light only reflects from mirrors and shiny objects.
• If students are asked what helps you see? Most will answer glasses, seeing-eye dogs, binoculars, hand lenses, or microscopes, not light.
• White light is pure and colorless light.
• Color is a property of something other than a property of light.
• Sunlight is red, yellow, or orange
• Light travels from our eyes so we can see.
• Light eminates from the object being looked at (not a property of what light is reflected or absorbed).
• A prism or colored filter (piece of gel or plastic) puts color into light when it passes through it.
• Bright light travels further than dim.
• Light travels further at night.
• Light only travels a short way.
• Light stops.
• Bats and owls can see in complete darkness.
• Humans can see in complete darkness after the eye adjusts. Students can persist with this belief by simply extending the time minutes, hours, days, years...

Concepts

Shadows

Misconceptions

Shadows come from me. From other people or objects.
Shadows follow you.
Shadows come from clouds or the sky
Shadows come from the sun as it shines on us and reflects off us to make a shadow.

Concepts

Rainbows

Misconceptions

Sunlight reflects from rain
Water sprinkler makes rainbows
Bubbles make rainbows
Mist, moisture in air causes rainbows
Pot of gold
Water falls through light. The water has color in it and when it hits the light you see it.
When light hits falling rain it makes all the colors in the raindrops to reflect off one another and the colors that are the same come together.

Robert Sweetland's Notes ©