Name : -Mohammed Ahmed Abdulla Alshehhi
-Ali Salem Rashed Alsharji
Section : 12-04
Term 2 Core Physics Project
What is a Telescope?!
A telescope is an instrument used to observe remote objects and the collection of
electromagnetic radiation. It is an amazing invention in the world of astronomy and
science.
How It Works?!
Light enters through the front objective lens and then passes through the eyepiece
lens before reaching your eye.
As light passes through glass, it slows down. Slowing down a light beam makes it
bend. Why? when a light beam passes through a glass lens inside a telescope, it
moves toward the lens. When the light beam comes out the other side, it’s bent!
The shape of the lens means light near the top of the lens is bent down and light
near the bottom of the lens is bent up. Somewhere inside the tube the light beams
cross, but before they can spread out again the eyepiece lens bends the light beams
again and sends them to the eye.
Because the light beams cross, the image ends up upside-down. This doesn’t matter
much when you’re looking at Mars or the Moon (remember there’s no real up or
down in space), but refracting telescopes used to see objects here on Earth often
have another set of lenses to flip the image right-side up again.
In a reflecting telescope, light bounces off mirrors instead of passing through lenses.
Refracting telescopes are simpler than reflecting telescopes, but they have an
important limitation. Remember that the light passing through the glass lens gets
bent. It turns out that different colours are bent different amounts, and that causes
the light to become unfocused. Isaac Newton solved this problem by replacing the
lenses with mirrors.
When light hits a mirror, it doesn’t bend. Instead, it bounces off. Just like a ball
bouncing off a wall, a light beam comes off a mirror the same way it comes in. In
other words, the angle in equals the angle out. And that rule is true for all the light,
no matter its colour.
The primary mirror in a reflecting telescope is curved just the right amount to
bounce all the light onto the secondary mirror. From there, the light passes through
the eyepiece lens, which bends the light into the eye.
What is a microscope?!
Microscope is a laboratory tool used to ENLARGE the image to view small objects
that can not be seen through the human eyes such as cells of organisms.
How It Works
A microscope uses the same trick as a refracting telescope — light waves being bent
as they travel through glass. In a telescope, the idea is to bend parallel light from
very faraway objects into a small focus at the eye. In a microscope, the idea is to
bend diverging (spreading-out) light into a parallel path, then bend that parallel-path
light into a small focus at the eye.
A microscope uses the same trick as a refracting telescope — light waves being bent
as they travel through glass. In a telescope, the idea is to bend parallel light from
very faraway objects into a small focus at the eye. In a microscope, the idea is to
bend diverging (spreading-out) light into a parallel path, then bend that parallel-path
light into a small focus at the eye
The power of the microscope depends on how much each lens bends the light.
Usually, the power is written right on the microscope itself. 40x, for instance, means
that the image at the eyepiece is 40 times larger than real life.