What is the speed of light?

For both converging and diverging lenses, discuss how the focal length for red light differs from that for violet light.

Which has the higher frequency, red light or violet light? Which has the longer wavelength? Which has the greater energy?

Which has the higher frequency, infrared light or ultraviolet light? Which has the longer wavelength? Which has the greater energy?

What is light scattering?

The average diameter of the Milky Way galaxy is about 115,000 light-years. Which choice below correctly expresses this in scientific notation? (1)

$$1 \times 10 ^ { 5 } \text { light-years }$$

(2)

$$115 \times 10 ^ { 5 } \text { light-years }$$

(3)

$$1.15 \times 10 ^ { 5 } \text { light-years }$$

(4)

$$2.3 \times 10 ^ { 10 } \text { light-years }$$

Given that the speed of light equals $3.0 \times 10^8 \mathrm{~m} / \mathrm{s}$ and the wavelength of light is $389 \mathrm{~nm}\left(389 \times 10^{-9} \mathrm{~m}\right)$, calculate the frequency of the light.

Which has the higher frequency, red light or violet light? Which has the longer wavelength? Which has the greater energy?

A traffic light at an intersection is hanging from two wires of equal length at $15^{\circ}$ below the horizontal. If the traffic light weighs 560 pounds, what is the tension in each wire keeping the light at equilibrium?

Repeat the construction from 8a by selecting an arbitrary point $A$ on the curve $y=x^3$. Show that the two areas R and S are always related in the same way.

What is a light year?

Explain the steps in the construction of the compound proposition that asserts that each of the nine 3 × 3 blocks of a 9 × 9 Sudoku puzzle contains every number.

White light falls on two narrow slits separated by 0.40 mm. The interference pattern is observed on a screen 3.0 m away. (a) What is the separation between the first maxima for red light (\lambda = 700 nm) and violet light (\lambda = 400 nm ) ? (b) At what point nearest the central maximum will a maximum for yellow light (\lambda = 600 nm ) coincide with a maximum for violet light? Identify the order for each maximum.

Identify the italicized word or phrase. Write $P$ for participle, $G$ for gerund, or $I$ for infinitive.

The photograph mounted in the silver frame was my mom's favorite birthday present.