Answer:
carpet
Explanation:
Diffuse reflection is the reflection of light from a surface such that an incident ray is reflected at many angles rather than at just one angle as in the case of specular reflection.
The structure of carpet's surface is as shown. Thus it shows large amount of diffuse reflection.
Explanation:
It is known that relation between torque and angular acceleration is as follows.
and, I =
So,
= 4
So,
= 1
as
=
Hence,
Thus, we can conclude that the new rotation is times that of the first rotation rate.
Answer:
40 m/s
Explanation:
If you multiply the acceleration with time you get the average speed.
Answer:
Sharper images will be produced by the new telescopes.
Construction and maintenance is expensive
Explanation:
The telescopes are put in space so that unfiltered light is received by the telescope. Telescopes on Earth receive light after the light has passed through our atmosphere. This affects the final image of the telescope.
Some of the telescopes being planned in the future are the Extremely Large Telescope (ELT) with mirror aperture diameter of 39.3 m, Thirty Meter Telescope (TMT) with mirror aperture diameter of 30 m, Giant Magellan Telescope (GMT) with mirror aperture diameter of 24.5 m. These mirrors have a significantly larger mirror aperture diameter than the space telescopes. The ELT will be able to produce an image 16 times sharper than the Hubble Telescope. It is also very expensive to make an maintain a telescope in space.
Keeping all this in mind the new telescopes are being made on Earth.