Physics Quiz

What is the small-angle approximation used for paraxial rays?

• sinθ = tanθ = θ

• sinθ = cosθ = θ

• tanθ = cosθ = θ

• sinθ = tanθ = 1/θ

What is the refractive index of the glass in Example 23.6?

• 1.33

• 1.50

• 1.00

• 2.50

According to the text, what is color associated with?

• The intensity of light

• The wavelength of light

• The speed of light

• The frequency of light

What did Newton use to study color, as shown in Figure 23.28?

• Mirrors

• Lenses

• Prisms

• Filters

What is white light composed of?

• A single color

• A mixture of all colors

• Only red and blue

• Only green and yellow

What does a prism do to light?

• Alters the color of light

• Changes the speed of light

• Separates light into its component colors

• Absorbs all light

Which color has the shortest wavelength in the visible spectrum?

• Red

• Green

• Blue

• Violet

According to the text, what is dispersion?

• The absorption of light by a prism

• The reflection of light off a surface

• The variation of the index of refraction with wavelength

• The bending of light around obstacles

What is the basic cause of a rainbow according to the text?

• Reflection only

• Refraction only

• Dispersion only

• A combination of refraction, reflection, and dispersion

What color is refracted predominantly at 42.5° in a rainbow?

• Blue

• Red

• Green

• Violet