Write the answer to the following question based on the data given in the table below. Position of the object Position of the image Enlarged/ diminished Erect/ inverted Real/ virtual Between mirror and F Behind the mirror Enlarged Erect Virtual On focal point At infinity - - - Between F and C Beyond C Enlarged Inverted Real On centre of curvature On C Same size Inverted Real Beyond C Between F and C Diminished Inverted Real What changes will come gradually in the size of an image, when we move an object away from the concave mirror?

A concave mirror can form both real and virtual images. When an object is placed between the pole of mirror and focus (F), the image formed by the concave mirror will be virtual, erect and enlarged. When we move the object away from the concave mirror, the size of the image decreases gradually. It will become extremely small in size when the object reaches infinity. The image will be real and inverted.

Write the answer to the following question based on the data given in the table below. Position of the object Position of the image Enlarged/ diminished Erect/ inverted Real/ virtual Between mirror and F Behind the mirror Enlarged Erect Virtual On focal point At infinity - - - Between F and C Beyond C Enlarged Inverted Real On centre of curvature On C Same size Inverted Real Beyond C Between F and C Diminished Inverted Real If the centre of curvature of a concave mirror is 10 cm , where the object should be placed to get an image at centre of curvature?

For a concave mirror, the image is obtained at the centre of curvature if the object is placed at the centre of curvature. Therefore, the object should be placed 10 cm in front of the concave mirror to get an image at the centre of curvature because it is given that the centre of curvature is 10 cm . The image formed will be real, inverted and of the same size as the object. Note: The distance from the pole to the centre of curvature is called the radius of curvature.

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Show the formation of image with a ray diagram when an object is placed on the principal axis of a concave mirror away from the centre of curvature.

Important Questions on Reflection of Light at Curved Surfaces

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Physical Science Class 9>Chapter 7 - Reflection of Light at Curved Surfaces>Think and discuss

In the figure given below, a set of parallel rays are falling on a convex mirror. What conclusions can you draw from this?

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Physical Science Class 9>Chapter 7 - Reflection of Light at Curved Surfaces>Think and discuss>Q ●

In the figure given below, a set of parallel rays are falling on a convex mirror. Will you get a point image if you place a paper at the focal point?

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Physical Science Class 9>Chapter 7 - Reflection of Light at Curved Surfaces>Think and discuss>Q 1

How can you find the focal length of a convex mirror?

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Physical Science Class 9>Chapter 7 - Reflection of Light at Curved Surfaces>Think and discuss>Q 2

Can we get a magnified image by a convex mirror?

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Physical Science Class 9>Chapter 7 - Reflection of Light at Curved Surfaces>Improve your learning>Q 22

How do doctors use concave mirrors?

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9th Andhra Pradesh Board

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Physical Science Class 9>Chapter 7 - Reflection of Light at Curved Surfaces>Improve your learning>Q 23

Why do we prefer a convex mirror as a rear-view mirror for the vehicles?

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Physical Science Class 9>Chapter 7 - Reflection of Light at Curved Surfaces>TRY THESE>Q 8

Write the answer to the following question based on the data given in the table below.

Position of the object	Position of the image	Enlarged/ diminished	Erect/ inverted	Real/ virtual
Between mirror and F	Behind the mirror	Enlarged	Erect	Virtual
On focal point	At infinity	-	-	-
Between F and C	Beyond C	Enlarged	Inverted	Real
On centre of curvature	On C	Same size	Inverted	Real
Beyond C	Between F and C	Diminished	Inverted	Real

What changes will come gradually in the size of an image, when we move an object away from the concave mirror?

EASY

9th Andhra Pradesh Board

IMPORTANT

Physical Science Class 9>Chapter 7 - Reflection of Light at Curved Surfaces>TRY THESE>Q 8

Write the answer to the following question based on the data given in the table below.

Position of the object	Position of the image	Enlarged/ diminished	Erect/ inverted	Real/ virtual
Between mirror and F	Behind the mirror	Enlarged	Erect	Virtual
On focal point	At infinity	-	-	-
Between F and C	Beyond C	Enlarged	Inverted	Real
On centre of curvature	On C	Same size	Inverted	Real
Beyond C	Between F and C	Diminished	Inverted	Real

If the centre of curvature of a concave mirror is $10 cm$ , where the object should be placed to get an image at centre of curvature?

Show the formation of image with a ray diagram when an object is placed on the principal axis of a concave mirror away from the centre of curvature.

Important Questions on Reflection of Light at Curved Surfaces

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