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1. Determine the optical power of the lenses below.a. A concave lens with focal length 10 cm

b. A convex lens with focal length 5 cm

c. A combined lens from both lenses

2. Two thin lenses with focal length -12 cm and 15 cm are stacked into one lens. Determine:a. The focal length,

b. The optical power of the lens.

3. Three identical lenses are merged and have the optical power 10 D. Calculate the focal length ofeach lens!

4. Two lenses (convex and concave lenses) are merged. The focal length of each lens is 10 cm and20 cm.

1. What is the optical power of the combined lens ?2. What is the new focal length of the combined lens ?

5. Determine the focal length of the lens if the optical power is :1. D2. 2 D3. 1/3 D4. 3 D

6. The optical power of lens is 10 D1. What is the type of lens ?2. Calculate the focal length !3. Describe the image if the object is placed 5 cm in front of the lens ?4. Calculate the magnification of the image !

7. An image was generated on x from a concave lens. The image was magnified by half again.When the object was moved to y, the magnification became 1/4 times the original size. If the

focal length was 5 cm, how had the original size of the object been shifted?

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8. An object is placed 5 cm in front of a concave lens that has a focal length of 6 cm. Determine theposition of the

image, the magnification, and the nature of the image!

9. An object is placed 10 cm in front of a divergent lens. The image size is 1/3 times the size of theobject and upright.What is the focal length of this lens?

10.The focal length of a concave lens is 6 cm. An object is placed 12 cm in front of the lens.Determine:

a.The image length,

b.The magnification of the image,

c.The size of the image if the object size is 12 cm.

The focal length of concave lens is 10 cm. An object is placed 16 cm in font of the lens.Determine the image length!

A divergent lens (f = 15 cm) is used to observe an object. Determine the magnification and thenature of the image if the object length is :

a. 30 cm in front of lensb. 10 cm in front of lensc. 45 cm in front of lensAn object is placed 32 cm in front of a lens. A screen is placed behind the lens and the object's image

occurs when the screen is 8 cm from lens.

a. What kind of lens that is used?

b. Calculate the focal length of the lens!

c. Calculate the magnification of the image!

d. Determine the nature of the image!

1. A lens is used in an experiment. Its curvature is 12 cm. The initial image was upright andmagnified twice. When the object is moved, the image is inverted and the size becomes 2/3 the

size of the object. Determine the distance the object has shifted!

2. An object is placed in front of a convergent lens (f = 16 cm). Determine the magnification andthe natures of image

that is generated by the lens if the object is placed at a distance of:

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a. 8 cm b. 16 cm

The focal length of a convex lens is 10 cm. If an object is placed 15 cm in front of the lens,determine:

a. The image length,

b. The image magnification,

c. The charateristics of the image.

A convex lens has 15 cm of focal length. Determine the image position, the magnification, andthe characteristics of the image of an object that are placed on:

a. 30 cm in front of the lens

b. 10 cm in front of the lens