1. Lesson 11 Key Concepts

2. 1.
Colored objects or surfaces absorb some colors of light and reflect others.

3. Color filters remove some colors from white light.2.
Color filters remove some colors from white light.

4. 3.
Subtractive color mixing takes place when colors are removed from mixtures of different wavelengths of light.

5. Lesson 11 Notes

6. 1.
Opaque objects appear colored because their surface absorbs some wavelengths of light and reflects others.
Ex: Green apple appears green in sunlight because it reflects green light and absorbs all others.
It is also based on how our eyes perceive the wavelengths of light reflected.

7. Subtractive Color Mixing: 2.
Subtractive Color Mixing:
Removing colors (wavelengths) from a mixture of different wavelengths of light.
Ex: colored filters: absorb (subtract) certain colors as light passes through but transmit (allow through) others.

8. 3.
Apparent color of an object depends on the color of light that reaches the eye from the object.
Ex: blue vase under sunlight looks blue; however under red light looks black.
Under red light, vase cannot reflect blue light as only red wavelengths are being used – therefore it looks black.