Quiz on Chapter 26

Question 1

The Hale Telescope: The 200-inch-diameter concave mirror of the Hale telescope on Mount Palomar has a focal length of 16.9 m. An astronomer stands 20.0 m in front of this mirror.

(a) Where is her image located? Is it in front of or behind the mirror?
(b) Is her image real or virtual? How do you know?
(c) What is the magnification of her image?

Answer 1

Question 2

Find the ratio of the speed of light in water to the speed of light in diamond.

Answer 2

Question 3

Light enters a container of benzene at an angle of 43 degrees to the normal; the refracted beam makes an angle of 27 degrees with the normal. Calculate the index of refraction of benzene.

Answer 3

Question 4

(a) Use a ray diagram to determine the approximate location of the image produced by a concave lens when the object is at a distance 1/2 f the lens.
(b) Is the image upright or inverted?
(c) Is the image real or virtual? Explain.

Answer 4

Question 5

An object is a distance f /2 from a convex lens.

(a) Use a ray diagram to find the approximate location of the image.
(b) Is the lmage upright or inverted? (c) Is the image real or virtual? Explain.

Answer 5

Question 6

Two lenses that are 35 cm apart are used to form an image, as shown in the figure. Lens 1 is diverging and has a focal length of f1= -7.0 cm; lens 2 is converging and has a focal length f2= 14 cm. The object is placed 24 cm to the left of lens 1.

(a) Use a ray diagram to find the approximate location of the image.
(b) Is the image upright or inverted?
(c) Is the image real or virtual? Explain.

Answer 6

Question 7

74.

Answer 7

2. The image is located just to theleft of lens 2
3. The image is inverted
4. Since the final image is on the same side of Lens 2 as its object (the original image, which is real), it is VIRTUAL

Question 8

An object is a distance 2f fron a convex lens.

(a) Use a ray diagram to find the approximate location of the image.
(b) Is the image upright or inverted?
(c) Is the image real or virtual? Exphin.

Answer 8