1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mazyrski [523]
3 years ago
13

1. On one of the shelves in your physics lab is displayed an antique telescope. A sign underneath the instrument says that the t

elescope has a magnification of 23.0 and consists of two converging lenses, the objective and the eyepiece, fixed at either end of a tube 81.0cm long. Assuming that this telescope would allow an observer to view a lunar crater in focus with a completely relaxed eye, what is the focal length fe of the eyepiece?
Note that to view the crater with a completely relaxed eye, the eyepiece must form its image at infinity and that images formed by telescopes of this nature are always inverted.
fe = ?cm
2. What is the focal length of the objective lens? (fo = ?cm)
Physics
1 answer:
Ira Lisetskai [31]3 years ago
8 0

Answer:

a)  f_{e} = 3,375 cm , b)  f₀ = 77.625 cm

Explanation:

The magnification of a telescope is, to see at the far point of vision (infinity image)

        m = - f₀ /  f_{e}

The length of the tube is

        L = f₀ + f_{e}

a) The focal length of the eyepiece

       L = - m  f_{e} +  f_{e}

       L = f_{e} (1-m)

        f_{e} = L / (1-m)

Let's calculate

        f_{e} = 81.0 / (1 - (-23.0)

        f_{e} = 3,375 cm

b) the focal length of the target

       f₀ = -m  f_{e}

       f₀ = 23 (3.68)

       f₀ = 77.625 cm

You might be interested in
A(n) ___ keeps a reaction from occurring by increasing the activation energy required for a reaction to occur. A. inhibitor B. c
skelet666 [1.2K]
Due to requirements i am typing this but the ans is a
8 0
2 years ago
Read 2 more answers
The weight of a body of certain mass becomes zero in space.why?write with reasons​
Anvisha [2.4K]

Answer:

Weight is what you get when a certain amount of gravity is acting on that mass, and something, like the surface of a planet, is resisting that action. In space, when falling freely, there's nothing resisting the pull of gravity so weight disappears. Mass however stays.

hope this helps u

Explanation:

7 0
3 years ago
A uniform rod of length 0.8 m and mass 1.4 kg, has two point masses at each end. The point mass on the left end has a mass 1.2 k
VladimirAG [237]

Answer:

Explanation:

1.2(0) + 3(0.8) + 1.4(0.8/2) / (1.2 + 3 + 1.4) = 0.5285714... ≈ 0.53 m

5 0
2 years ago
Which of the following is an example of a noninfectious disease?
Scorpion4ik [409]
D lung cancer is not infectious
3 0
2 years ago
Read 2 more answers
A 25 kg child is riding on a swing. If the child travels 8.9 m/s at the bottom of their swing, how high into the air is the chil
Setler [38]

Answer:

h = 4.04 m

Explanation:

Given that,

Mass of a child, m = 25 kg

The speed of the child at the bottom of the swing is 8.9 m/s

We need to find the height in the air is the child is able to swing. Let the height is h. Using the conservation of energy such that,

mgh=\dfrac{1}{2}mv^2\\\\h=\dfrac{v^2}{2g}

Put all the values,

h=\dfrac{(8.9)^2}{2\times 9.8}\\\\h=4.04\ m

So, the child is able to go at a height of 4.04 m.

7 0
2 years ago
Other questions:
  • How does the suns energy contribute to the carbon cycle
    15·1 answer
  • What is accommodation in the eye? how are the muscles involved in this process?
    14·1 answer
  • A copper rod is 0.450 m long. Heat is added to the rod until it expands by 0.00130 m. How much did the temperature change? (Unit
    11·1 answer
  • What does a Battery and a human have in common?
    11·1 answer
  • Does Sun burn? If yes, it burns without Oxygen?
    13·2 answers
  • What are three ways in which people use microwaves?
    5·2 answers
  • You are designing an amusement park ride. A cart with two riders moves horizontally with speed v = 5.40 m/s . You assume that th
    14·1 answer
  • Two drag cars race. They line up at the starting line at rest. The winning car accelerates at a constant rate a and reaches the
    11·1 answer
  • What is the velocity of an object that has been in free fall for 0.10 s?
    8·1 answer
  • What has more momentum a large truck stopped at a stop sign or a motorcycle moving down the road.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!