IMAGES FORMED BY LENSES

Here are 10 one-word answer type questions from the topic Images Formed by Lenses with their answers and explanations:

Topic: Images Formed by Lenses

Lenses are transparent objects which bend light rays. There are two types of lenses – convex lens and concave lens. They form different kinds of images depending on the position of the object.

1. Question: Which lens is thicker in the middle and thinner at the edges?

Answer: Convex

Explanation: A convex lens is thicker in the middle and thinner at the edges.

2. Question: Which lens is thinner in the middle and thicker at the edges?

Answer: Concave

Explanation: A concave lens is thinner in the middle and thicker at the edges.

3. Question: What is the image formed by a convex lens when the object is placed very close to it?

Answer: Virtual

Explanation: When an object is very close to a convex lens, it forms a virtual, erect, and magnified image.

4. Question: What is the image formed by a concave lens?

Answer: Virtual

Explanation: A concave lens always forms a virtual, erect, and smaller image.

5. Question: What kind of lens is used as a magnifying glass?

Answer: Convex

Explanation: A convex lens is used in magnifying glasses to produce a magnified image.

6. Question: Which lens is called a converging lens?

Answer: Convex

Explanation: A convex lens bends light rays inwards and is called a converging lens.

7. Question: Which lens is called a diverging lens?

Answer: Concave

Explanation: A concave lens bends light rays outwards and is called a diverging lens.

8. Question: What type of image is formed by a convex lens when the object is far away?

Answer: Real

Explanation: A convex lens forms a real and inverted image when the object is far away.

9. Question: What is the shape of a concave lens?

Answer: Diverging

Explanation: A concave lens diverges light rays and has a diverging shape.

10. Question: What is the position of the image formed by a convex lens when used as a magnifying glass?

Answer: Same side

Explanation: The virtual image formed by a convex lens when used as a magnifying glass is on the same side as the object.

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