Physics

Grade-10

Easy

Question

# An object of height 2 m is located at a distance of 50 cm from a convex lens of focal length 25 cm. The image is of height ____ m.

Hint:

### For a convex lens, **magnification** is the** ratio** between **object distance **and** image distance.**

## The correct answer is: 2

### An object of height 2 m is located at a distance of 50 cm from a convex lens of focal length 25 cm. The image is of height 2 m.

- Given, the object's height is 2m, the distance of the object is 50cm, and the focal length is 25cm.
- The focal length is the point where the image falls in the principle axis.
- As the focal length is 50 m, the image falls at 50cm from the pole.
- Thus, magnification m= v/u= 50/25= 2cm.

### Related Questions to study

Physics

### The image of an object located at a distance of 25 cm towards the left of a concave lens is formed at a distance of 5 cm at the same side of the lens. The magnification produced by the lens is ____.

- 0.2
- -0.2
- 0.25
- -0.25

### The image of an object located at a distance of 25 cm towards the left of a concave lens is formed at a distance of 5 cm at the same side of the lens. The magnification produced by the lens is ____.

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- 0.2
- -0.2
- 0.25
- -0.25

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### The magnification produced by a concave lens is always ____.

- Greater than 1
- Negative
- Positive
- None of these

### The magnification produced by a concave lens is always ____.

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- Greater than 1
- Negative
- Positive
- None of these

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### Which of the following is correct?

- vh = uH
- uh = vH
- vuh = H
- vh = uvH

### Which of the following is correct?

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- vh = uH
- uh = vH
- vuh = H
- vh = uvH

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### Which of the following is a formula to measure the magnification produced by a lens?

- v/u
- -v/u
- u/v
- -u/v

### Which of the following is a formula to measure the magnification produced by a lens?

PhysicsGrade-10

- v/u
- -v/u
- u/v
- -u/v

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### What is the unit of measurement of magnification?

- m
- D
- It is unitless
- cm

### What is the unit of measurement of magnification?

PhysicsGrade-10

- m
- D
- It is unitless
- cm

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### Magnification is mathematically given by ____, H is the height of the image and h is the height of the object.

- Hh
- h/H
- H/h
- H
^{2}h

### Magnification is mathematically given by ____, H is the height of the image and h is the height of the object.

PhysicsGrade-10

- Hh
- h/H
- H/h
- H
^{2}h

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### “The radius of a convex lens is always negative.”

This statement is _____.

- True
- False

### “The radius of a convex lens is always negative.”

This statement is _____.

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- True
- False

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### A _____ image is always formed at the opposite side of a lens, and a _______ image is always formed at the same side of a lens as the object.

- Real, virtual
- Real, real
- Virtual, virtual
- Virtual, real

### A _____ image is always formed at the opposite side of a lens, and a _______ image is always formed at the same side of a lens as the object.

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- Real, virtual
- Real, real
- Virtual, virtual
- Virtual, real

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### An object is located in front of a convex lens of focal length 53 cm at a distance of 106 cm. The image of this object will be formed at a distance of ____ cm from the lens.

### An object is located in front of a convex lens of focal length 53 cm at a distance of 106 cm. The image of this object will be formed at a distance of ____ cm from the lens.

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### An object is situated at an infinite distance from a convex lens of focal length 55 cm. Its image will be formed _____.

- In the same side as the object
- In the opposite side as the object
- Behind the object
- At optic center

### An object is situated at an infinite distance from a convex lens of focal length 55 cm. Its image will be formed _____.

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- In the same side as the object
- In the opposite side as the object
- Behind the object
- At optic center

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### An object is situated at an infinite distance from a convex lens of focal length 55 cm. Its image will be formed at a distance of ___ cm from the lens.

### An object is situated at an infinite distance from a convex lens of focal length 55 cm. Its image will be formed at a distance of ___ cm from the lens.

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### The radius of curvature of a convex lens is 190 cm. Its focal length is ____ cm.

### The radius of curvature of a convex lens is 190 cm. Its focal length is ____ cm.

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### The ray diagram below shows the image formation by a concave lens. Which of the following is true about different measurements?

- f, u and v all are positive
- f, u and v all are negative.
- f is negative and u and v are positive.
- f is positive and u and v are negative.

### The ray diagram below shows the image formation by a concave lens. Which of the following is true about different measurements?

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- f, u and v all are positive
- f, u and v all are negative.
- f is negative and u and v are positive.
- f is positive and u and v are negative.

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### The ray diagram below shows a case of the image formation by a convex lens. Here the object distance is ____, and the image distance is _____.

- Positive, positive
- Positive, negative
- Negative, positive
- Negative, negative

### The ray diagram below shows a case of the image formation by a convex lens. Here the object distance is ____, and the image distance is _____.

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- Positive, positive
- Positive, negative
- Negative, positive
- Negative, negative

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### The ray diagram below shows a case of the image formation by a convex lens. Here the object distance is ____, and the image distance is _____.

- Positive, positive
- Positive, negative
- Negative, positive
- Negative, negative

### The ray diagram below shows a case of the image formation by a convex lens. Here the object distance is ____, and the image distance is _____.

PhysicsGrade-10

- Positive, positive
- Positive, negative
- Negative, positive
- Negative, negative