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
shusha [124]
3 years ago
15

Why are so many large optical telescopes located on mountaintops

Physics
2 answers:
postnew [5]3 years ago
8 0
Avoid cloud and man-made lights
Ivahew [28]3 years ago
3 0
Because light is degraded when it has to pass through air.

The best places for large telescopes would be on the Moon, in space,
or in orbit (like the Hubble, Kepler, and Webb space telescopes). 

If you can't manage any of those places, or can't afford them, then
the next best choice for a location is any place where the light doesn't
need to plow through a lot of air to reach your telescope.  Those places
are either on top of mountains or under giant helium balloons.  Both of
these ideas have been used extensively for the past 100 years.
You might be interested in
Is my answer correct? Please i need to know
Alexeev081 [22]
Yes. Your answer is correct. I hope you do well on the quiz or whatever it is.
5 0
2 years ago
Read 2 more answers
A ball is dropped from a window and takes two seconds to reach the ground .it starts from rest and reaches a final speed of 20m/
Akimi4 [234]
The ball can't reach the speed of 20 m/s in two seconds, unless you THROW it down from the window with a little bit of initial speed. If you just drop it, then the highest speed it can have after two seconds is 19.6 m/s .

If an object starts from rest and its speed after 2 seconds is 20 m/s, then its acceleration is 20/2 = 10 m/s^2 .

(Gravity on Earth is only 9.8 m/s^2.)
3 0
3 years ago
Why does jupiter have several distinct cloud layers?
pentagon [3]

Different layers represent clouds made of gases that condense at different temperatures.

4 0
3 years ago
Suppose you observe two stars and you know they have the same luminosity. If one star is twice as far away as the other, the mor
rosijanka [135]

Answer:

The farther star will appear 4 times fainter than the star that is near to the observer.

Explanation:

Since it is given that the luminosity of the 2 stars is same thus they radiate the same energy per unit time

Consider a spherical wave front of energy 'E' that leaves both the stars (Both radiate 'E' as they have same luminosity)

This Energy is spread over the whole surface area of sphere Thus when the wave front is at a distance 'r' the energy per unit surface area is given by

e_{1}=\frac{E}{4\pi r^{2}}

For the star that is twice away from the earth the distance is '2r' thus we will receive an energy given by

e_{2}=\frac{E}{4\pi (2r)^{2}}=\frac{E}{8\pi r^{2}}=\frac{e_{1}}{4}

Hence we sense it as 4 times fainter than the nearer star.

5 0
3 years ago
__________ is the most common type of stretching.
Verizon [17]

Answer: static stretching

Explanation:

e.g rubberband

6 0
3 years ago
Read 2 more answers
Other questions:
  • (01.02 MC) Nicole pushes her bike up a hill. Overhead, the sun exerts a gravitational force on Earth. Which statement is true ab
    9·2 answers
  • A phoneme is the largest unit of sound in a word. TRUE or FALSE.
    11·2 answers
  • The resistivity of gold is 2.44 × 10-8 Ω · m at room temperature. A gold wire that is 1.8 mm in diameter and 11 cm long carries
    14·1 answer
  • Wildlife biologists are attempting to monitor the population size of the insect pest known as the gypsy moth (Lymantria dispar)
    12·2 answers
  • Properties of convex mirror
    10·1 answer
  • The function H(t) = -16t^2 + vt + s shows the height H (t), in feet, of a projectile launched vertically from s feet above the g
    15·1 answer
  • <img src="https://tex.z-dn.net/?f=%5Chuge%5Cbold%5Cblue%7BQuestion%3A-%7D%20%5C%5C%20%5C%5C%20%5Chuge%20" id="TexFormula1" title
    9·2 answers
  • According to the Law of Reflection, the angle of incidence the angle of reflection. O A. is greater than B. is less than C. equa
    9·1 answer
  • Leverrier predicted that an invisible planet was pulling the planet Uranus off its predicted course around the sun. Likewise, hu
    15·1 answer
  • A race car goes around a level, circular track with a diameter of 1.00 km at a constant speed of 95 km/h. What is the car's cent
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!