Telescope In Physics

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Telescopes are used everyday to view distant or far objects, they produce an image bigger than what can be seen with the unaided eye. To do this, telescopes must gather in a lot more light so that dull objects can be more visible and can be observed in greater detail.

Refraction is due to light changing speed when moving from different mediums. Light rays travel through different substances at different speeds. The index of refraction is the speed of light that is inside of a vacuum (its maximum speed) divided by speed of light in the medium.
For example; the index of refraction for air is 1.0003 and the index of refraction is 1.3 for water. This is why objects can often appear ‘bent’ when crossing between different mediums as the greater
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1.5
Diamond 2.4

On a light ray, the angle of incidence will help determine the angle of refraction. There is a intercept point as shown below where the two mediums and the normal meet. The angle between the incidence ray and the normal is the angle of incidence and the angle between the ray of refraction and the normal is the angle of refraction.

Rays that travel into less dense areas than originally (Index of refraction decreases) will cause the angle of refraction to be greater than the angle of incidence, making it refract away from the normal.

Rays that travel into more dense areas than originally (Index of refraction decreases) will cause the angle of refraction to be less than the angle of incidence, making it refract towards the
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Telescopes gather far more light than the eye, allowing dim objects to be observed with greater magnification and better resolution. Although Galileo is often credited with inventing the telescope, he actually did not. What he did was more important. He constructed several early telescopes, was the first to study the heavens with them, and made monumental discoveries using them. Among these are the moons of Jupiter, the craters and mountains on the Moon, the details of sunspots, and the fact that the Milky Way is composed of vast numbers of individual

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