The diagram below shows a lens as a combination of a glass block and two prisms. Name the lens formed by the combination.

We can consider a lens as being made up of a rectangular block at the centre and one prism on either side of it. The lens formed by the above combination is a convex lens. This lens in its upper part has a prism with its base downwards and in its lower part has a prism with its base upwards.

The diagram below shows a lens as a combination of a glass block and two prisms. Complete the ray diagram and show the path of the incident ray A B after passing through the lens.

We can consider a lens as being made up of a rectangular block at the centre and one prism on either side of it. The lens formed by the above combination is a convex lens. The following diagram shows the path of the incident ray A B after passing through the convex lens: Here, the prism in the upper part of the convex lens bends the incident ray A B downwards and it meets the principal axis, X X ' at the point F which is the focus.

The diagram below shows a lens as a combination of a glass block and two prisms. Name the lens formed by the combination.

We can consider a lens as being made up of a rectangular block at the centre and one prism on either side of it. The lens formed by the above combination is a concave lens. This lens in its upper part has a prism with its base upwards and in its lower part has a prism with its base downwards.

The diagram below shows a lens as a combination of a glass block and two prisms. Complete the path of the incident ray A B after passing through the lens.

We can consider a lens as being made up of a rectangular block at the centre and one prism on either side of it. The lens formed by the above combination is a concave lens. The following diagram shows the path of the incident ray A B after passing through the concave lens: In the above figure, the prism in the upper part of the concave lens bends the incident ray A B upwards i.e., towards the base of the prism. Thus, we can say that the prism on the upper side of a concave lens diverges the parallel ray as if it is coming from a point F situated on the side of the ray incident on the lens. Here the point F is known as the focus (focal point). The point F is situated on X X ' and it represents the principal axis.

The diagram below shows a lens as a combination of a glass block and two prisms. The final emergent ray either meets X X ' at a point or appears to come from a point on X X ' . Label it as F . What is this point called?

We can consider a lens as being made up of a rectangular block at the centre and one prism on either side of it. The lens formed by the above combination is a concave lens. The following diagram shows the path of the incident ray A B after passing through the concave lens: In the above figure, the prism in the upper part of the concave lens bends the incident ray A B upwards i.e., towards the base of the prism. Thus, we can say that the prism on the upper side of a concave lens diverges the parallel ray as if it is coming from a point F situated on the side of the ray incident on the lens. Here the point F is known as the focus (focal point). The point F is situated on X X ' and it represents the principal axis. A concave lens is also known as a diverging lens as it has a diverging action on the incident light rays.

E M B I B E

Selina Icse Concise Physics For Class 10>Chapter 5 - Refraction Through a Lens>EXERCISE-5(A)>Q 24

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10th ICSE

IMPORTANT

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A parallel oblique beam of light falls on a concave lens. Draw a diagram to show the refraction of light through the lens.

Important Questions on Refraction Through a Lens

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10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 5 - Refraction Through a Lens>EXERCISE-5(A)>Q 25

The diagram below shows a lens as a combination of a glass block and two prisms.

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Name the lens formed by the combination.

EASY

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 5 - Refraction Through a Lens>EXERCISE-5(A)>Q 25

The diagram below shows a lens as a combination of a glass block and two prisms.

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What is the line $X X^{'}$ called?

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10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 5 - Refraction Through a Lens>EXERCISE-5(A)>Q 25

The diagram below shows a lens as a combination of a glass block and two prisms.

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Complete the ray diagram and show the path of the incident ray $A B$ after passing through the lens.

MEDIUM

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 5 - Refraction Through a Lens>EXERCISE-5(A)>Q 25

The diagram below shows a lens as a combination of a glass block and two prisms.

Question Image

The final emergent ray will either meet $X X^{'}$ at a point or appear to come from a point on $X X^{'}$ . Label the point as $F$ . What is this point called?

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10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 5 - Refraction Through a Lens>EXERCISE-5(A)>Q 26

The diagram below shows a lens as a combination of a glass block and two prisms.

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