How we see color PT review

How we see color...

performance task review

Mechanical waves

• waves that transfer energy through matter

• require a medium

• examples: water, sound, earthquake

electromagnetic waves

• waves that transfer energy through a field( electric & magnetic)

• does NOT require a medium ( can travel through a vacuum)

• examples:light, UV, radio, microwaves, x-rays

​light from a full spectrum source (ie: sun, flashlight, "white" light) emits all of the wavelengths (ROYGBIV)

Multiple Choice

How do we see an object?

• Light travels from a source, reflects off the object and into our eyes.

• Light travels from our eyes and reflects off the object, then reflects back to the source

• Light reflects off our eyes and enters the object

• The object produces its own light

Multiple Choice

What wave behavior allows the human eye to see color?

• Interference

• Refraction

• Diffraction

• Reflection

Multiple Choice

An opaque object...

• allows light to pass through

• allows some light to pass through

• allows no light to pass through

Multiple Choice

Material that allows light to pass through allowing you to see "clearly" to the other side.

• opaque

• translucent

• transparent

Multiple Choice

Wax paper or a foggy window is an example of what type of material?

• transparent

• translucent

• opaque

Multiple Choice

What occurs when light waves pass THROUGH a given point or medium?

• transmission

• reflection

• absorption

• refraction

Multiple Choice

What colors is white light made from?

• Orange, Green, Pink, Magenta, Peach, Rose, Lemon

• Red, Orange Yellow, Green, Black, Indigo, Violet

• Red, Orange, Yellow, Green, Blue, Indigo, Violet

• Red, Orange, Yellow, Grey, Blue, Indigo, Violet

Multiple Choice

Which color REFLECTS all wavelengths of light?

• Red

• Black

• White

• Pink

Multiple Choice

Which color ABSORBS all wavelengths of light?

• Red

• Black

• White

• Pink

Multiple Choice

Why does this apple look red?

• The apple reflects red light and absorbs all other colors

• The apple absorbs red light and reflects all other colors

• The apple reflects all the light shinning on it

• The apple is red because we see that color.

Study these models

go to the question on the next slide

Multiple Choice

Which model correctly shows how light would interact with the t-shirt and shorts?

• A

• B

• C

• D

Multiple Select

Why does this the t-shirt appear red and the shorts appear blue? Choose the correct statements.

• The t-shirt reflects red light.

• The t-shirt reflects blue light

• The shorts absorb yellow light

• The shorts reflect blue light

• Other colours are absorbed