(a) Draw a ray diagram to show image formation when the concave mirror produces a real, inverted and magnified image of the object.
(b) Obtain the mirror formula and write the expression for the linear magnification.
(c) Explain two advantages of a reflecting telescope over a refracting telescope.
Answers
Let us look at the answer:
Explanation:
a) The concave mirror usually produces a real, inverted and magnified image of an object.
- It produces image of same size when object is placed at C .
- It produces point sized image of an object when is far off infinity.
b) The mirror formula is given by: 1/u+ 1/v = 1/f
,u (object distance) from P is always negative.
f (focal length) is also negative, while for convex it is positive.
v ( image distance) is generally negative for concave.
magnification = -v/u = height of image /height of object
c) reflecting telescope :
- They are easier to construct and comparatively easier to assemble.
- They have one reflective surface i.e. do not cause obstructions as the light passes completely through it.
refracting telescope: they are used for smaller telescopes as the light causes obstructions in the path.
Answer:
Let us look at the answer:
a) The concave mirror usually produces a real, inverted and magnified image of an object.
It produces image of same size when object is placed at C .
It produces point sized image of an object when is far off infinity.
b) The mirror formula is given by: 1/u+ 1/v = 1/f
,u (object distance) from P is always negative.
f (focal length) is also negative, while for convex it is positive.
v ( image distance) is generally negative for concave.
magnification = -v/u = height of image /height of object
c) reflecting telescope :
They are easier to construct and comparatively easier to assemble.
They have one reflective surface i.e. do not cause obstructions as the light passes completely through it.
refracting telescope: they are used for smaller telescopes as the light causes obstructions in the path.
Explanation:
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