# Joe is hiking through the woods when he decides to stop and take in the view. He is particularly interested in three objects: a squirrel sitting on a rock next to him, a tree a few meters away, and a distant mountain. As Joe is taking in the view, he thinks back to what he learned in his physics class about how the human eye works. Light enters the eye at the curved front surface of the cornea, passes through the lens, and then strikes the retina and fovea on the back of the eye. The cornea and

###### Question:

Joe is hiking through the woods when he decides to stop and take in the view. He is particularly interested in three objects: a squirrel sitting on a rock next to him, a tree a few meters away, and a distant mountain. As Joe is taking in the view, he thinks back to what he learned in his physics class about how the human eye works.
Light enters the eye at the curved front surface of the cornea, passes through the lens, and then strikes the retina and fovea on the back of the eye. The cornea and lens together form a compond lens system. The large difference between the index of refraction of air and that of the aqueous humor behind the cornea is responsible for most of the bending of the light rays that enter the eye, but it is the lens that allows our eyes to focus. The ciliary muscles surrounding the lens can be expanded and contracted to change the curvature of the lens, which in turn changes the effective focal length of the cornea-lens system. This in turn changes the location of the image of any object in one's field of view. Images formed on the fovea appear in focus. Images formed between the lens and the fovea appear blurry, as do images formed behind the fovea. Therefore, to focus on some object, you adjust your ciliary muscles until the image of that object is located on the fovea.
A) Joe first focuses his attention (and his eyes) on the tree. The focal length of the cornea-lens system in his eye must be __________ the distance between the front and back of his eye.
a. greater than
b. less than
c. equal to
B) Joe's eyes are focused on the tree, so the squirrel and the mountain appear out of focus. This is because the image of the squirrel is formed ______ and the image of the mountain is formed _____.
a. between the lens and fovea / between the lens and fovea
b. between the lens and fovea / behind the fovea
c. behind the fovea / between the lens and fovea
d. behind the fovea / behind the fovea
C) Joe now shifts his focus from the tree to the squirrel. To do this, the ciliary muscles in his eyes must have _____ the curvature of the lens, resulting in a(n) _______ focal length for the cornea-lens system. Note that curvature is different from radius of curvature.
a. increased / increased
b. increased / decreased
c. decreased / increased
d. decreased / decreased

### Mera painted equal sections of her bedroom wall to make a pattern. She painted 2/5 of the wall white and 1/2 of the wall lavender. Write an equivalent fraction for each using a common denominator.

Mera painted equal sections of her bedroom wall to make a pattern. She painted 2/5 of the wall white and 1/2 of the wall lavender. Write an equivalent fraction for each using a common denominator....

### Why can't no one give me brainless?

Why can't no one give me brainless?...

### Marketing research indicates that almost 70 percent of all women drivers who have driven a Volkswagen Cabrio prefer it to any other car. Knowing that women make about 35 percent of all car purchases, what type of segmentation variable should Volkswagen use when marketing its Cabrio?

Marketing research indicates that almost 70 percent of all women drivers who have driven a Volkswagen Cabrio prefer it to any other car. Knowing that women make about 35 percent of all car purchases, what type of segmentation variable should Volkswagen use when marketing its Cabrio?...

### Geothermal power would be classified as an______resource because its supply will not run out.

Geothermal power would be classified as an______resource because its supply will not run out....

### A girl walks 26 m at an angle of 39º W of S. a. How far west of her starting point is she? ___ m b. How far south of her starting point is she? ___ m Answer choices 20.2 0.67 65 26 13 16.4

A girl walks 26 m at an angle of 39º W of S. a. How far west of her starting point is she? ___ m b. How far south of her starting point is she? ___ m Answer choices 20.2 0.67 65 26 13 16.4...

### ​al and peg are a typical american couple who have cohabitated for many years. if they later marry each other, they are likely to be ____ than other married couples who did not cohabitate.

​al and peg are a typical american couple who have cohabitated for many years. if they later marry each other, they are likely to be ____ than other married couples who did not cohabitate....

### What does jefferson believe was the motive of the farmers who rebelled

what does jefferson believe was the motive of the farmers who rebelled...

### Most scientists agree that there is no single ______________ for solving problems

most scientists agree that there is no single ______________ for solving problems...

### Solution to wild fire

solution to wild fire...

### 15 POINTS PLEASE HURRY ANSWER MAY BE IN FRACTION FORM AND ALSO HAVE A PI SIGN AT THE END !!

15 POINTS PLEASE HURRY ANSWER MAY BE IN FRACTION FORM AND ALSO HAVE A PI SIGN AT THE END !!...

### A golfer hits a golf ball at an angle of 25.0° to the ground. If the golf ball covers a horizontal distance of 301.5 m, what is the ball’s maximum height? (Hint: At the top of its flight, the ball’s vertical velocity component will be zero.

A golfer hits a golf ball at an angle of 25.0° to the ground. If the golf ball covers a horizontal distance of 301.5 m, what is the ball’s maximum height? (Hint: At the top of its flight, the ball’s vertical velocity component will be zero....

### 1. Please help, I have a C in this class! Options- Parliament, Bill of Rights, Council of State, Colonial Court, Governor, Bicameral, James II, Town Meetings, Privy Council, Sir Edmond Andros, Dominion of New England, House of Burgesses.

1. Please help, I have a C in this class! Options- Parliament, Bill of Rights, Council of State, Colonial Court, Governor, Bicameral, James II, Town Meetings, Privy Council, Sir Edmond Andros, Dominion of New England, House of Burgesses....

### Receive 1 million in cash gift do i have to file taxes

receive 1 million in cash gift do i have to file taxes...

### How do I find simple interest rates?

How do I find simple interest rates?...

### HELP ME ASAP HISTORY I REALLY NEED HELP ON THESE Setting the Stage Before 1850, part 1 1) According to which document do judges decide the law based on previous court cases? A) Parliament Act B) English common law C) Magna Carta 2) Which of the following heavily influenced the French Declaration of the Rights of Man and of the Citizen and the U.S. Declaration of Independence? A) Enlightenment philosophers B) divine right of kings C) Catholic Reformation D) women's movement 3) According to P

HELP ME ASAP HISTORY I REALLY NEED HELP ON THESE Setting the Stage Before 1850, part 1 1) According to which document do judges decide the law based on previous court cases? A) Parliament Act B) English common law C) Magna Carta 2) Which of the following heavily influenced the French Declaration of...

### What answer best describes the U.S.'s response to the destruction in Europe after WWII?

What answer best describes the U.S.'s response to the destruction in Europe after WWII?...

### Let y = [5 5] and u = [6 8] . Compute the distance from y to the line through u and the origin.

Let y = [5 5] and u = [6 8] . Compute the distance from y to the line through u and the origin....