Color Perception and Light Interaction

The video explains that most objects are visible due to reflected light, not because they emit light. Using an apple as an example, it illustrates selective reflection, where certain colors are reflected while others are absorbed. The apple appears red because its pigments reflect red light and absorb other colors. When illuminated with blue light, the apple appears black as no red light is reflected. The video concludes that the color we perceive depends on the light source.

What is the primary reason we can see most everyday objects?

• They emit their own light.

• They are transparent.

• They reflect light from a source.

• They absorb all light.

Why does an apple appear red when illuminated by sunlight?

• It absorbs red light and reflects all others.

• It emits red light.

• It is naturally red regardless of light.

• It reflects red light and absorbs all others.

What is the term used to describe the phenomenon where only certain colors are reflected by an object?

• Color diffusion

• Selective reflection

• Color emission

• Color absorption

What happens to a red apple when it is illuminated with blue light?

• It appears blue.

• It appears red.

• It appears black.

• It appears white.

Why does a red apple appear black under blue light?

• The blue light is reflected.

• The apple emits black light.

• The blue light is absorbed, and no light is reflected.

• The apple changes its color to black.

What determines the color we perceive an object to be?

• The object's size

• The object's temperature

• The light source illuminating the object

• The object's natural color

If an object absorbs all colors of light, what color does it appear?

• Blue

• Red

• White

• Black

What is the key takeaway about color perception from the video?

• The color we see depends on the light source.

• Color perception is independent of light sources.

• Objects have a fixed color regardless of light.

• Objects emit their own colors.