State two positions in which a concave mirror produces a magnified image of a given object. List two differences between two images.
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Answered by
59
The two positioms are as follows :
(1) between centre of curvature and focus (real image)
(2) between pole and focus of the mirror (virtual image)
Real image :
--> real image can be obtained on a screen
--> real images are always inverted, formed when light rays after reflection or refraction converges to a point.
Virtual image:
--> virtual image cannot be obtained on the screen.
--> virtual images are erect w.r.t. object, formed when rays after reflection appear to be coming from a point.
☆ make sure u write the difference in tabular form :)
(1) between centre of curvature and focus (real image)
(2) between pole and focus of the mirror (virtual image)
Real image :
--> real image can be obtained on a screen
--> real images are always inverted, formed when light rays after reflection or refraction converges to a point.
Virtual image:
--> virtual image cannot be obtained on the screen.
--> virtual images are erect w.r.t. object, formed when rays after reflection appear to be coming from a point.
☆ make sure u write the difference in tabular form :)
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Answered by
13
Concave mirror is a mirror , which is bulged inside. It is used as shaving mirrors, and also by doctors for examining teeth.
Concave mirror always produce real and inverted image , except in one case , where the image is formed virtual and erect , when the object is placed very near to the mirror(between P and F).
Magnified image - Highly enlarged image ( size of image > size of object)
(i) When the object is placed at F , the image is formed at infinity.
(ii) When the object is placed between P and F ,magnified image is formed.
Differences :-
In the first case (i) ,
1. The image is formed at infinity .
2. Size of image is highly enlarged.
3.Also , the image is real and inverted.
In the second case (ii) ,
1. The image is formed behind the mirror. 2. Size of
image is enlarged .
3.Also, the image formed is virtual and erect.
Concave mirror always produce real and inverted image , except in one case , where the image is formed virtual and erect , when the object is placed very near to the mirror(between P and F).
Magnified image - Highly enlarged image ( size of image > size of object)
(i) When the object is placed at F , the image is formed at infinity.
(ii) When the object is placed between P and F ,magnified image is formed.
Differences :-
In the first case (i) ,
1. The image is formed at infinity .
2. Size of image is highly enlarged.
3.Also , the image is real and inverted.
In the second case (ii) ,
1. The image is formed behind the mirror. 2. Size of
image is enlarged .
3.Also, the image formed is virtual and erect.
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