Concept explainers
The phenomenon of refraction and reflection.
The way in which these processes enable astronomers to build telescopes.
Answer to Problem 1Q
Refraction: The bending of light rays when they pass from one transparent medium to another is known as refraction of light.
Reflection: when light rays return to the same medium from where it comes, it is known as reflection of light.
Astronomers use the principle of reflection and refraction to form telescope, as using the convex lens, the light rays coming from a distant object appears bright and larger at the focus point of the lens.
Explanation of Solution
Introduction:
Telescopes works on the principle of reflection and refraction of light rays.
Refraction is the change in direction of a light ray when it passes from one transparent medium such as water or glass to another. Refraction occurs due to change in medium of light, which changes the
Reflection is the process of returning of light to the same medium from which it originated.
Astronomers observed that the convex lens converges the light coming from a distant object to the focal point of the lens. Similarly, concave mirror causes parallel light rays to converge to the focus of the mirror. By using another mirror, these focused rays of light are reflected towards the eye piece.
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UNIVERSE (LOOSELEAF):STARS+GALAXIES
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