Question

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A small object is located 28.0 cm in front of a concave mirror with a radius of curvature of 38.0 cm. Where will the image be formed? (Enter a negative value if the image forms behind the mirror.) An object with a height of 42 cm is placed 1.9 m in front of a convex mirror with a focal length of -0.49 m. Find the location and magnification of the image produced by the mirror using the mirror and magnification equations. The 200-inch-diameter concave mirror of the Hale telescope on Mount Palomar has a focal length of 14.1 m. An astronomer stands 20.9 m in front of this mirror. Where is her image located? Is it in front of or behind the mirror? behind the mirror in front of the mirror Is her image real or virtual? real virtual How do you know? This answer has not been graded yet. What is the magnification of her image?

Answer 1

10) u = 28 cm

f = R/2 = 38/2 = 19 cm

v = ?

1/u + 1/v = 1/f

1/v = 1/f - 1/u

1/v = 1/19 - 1/28

v = 59.1 cm

11)

h = 42 cm

u = 1.9 m

f = -0.49 m

let v is the image distance.

apply, 1/u + 1/v = 1/f

1/v = 1/f - 1/u

1/v = 1/(-0.49) - 1/1.9

v = -0.39 m <<<<-----Answer

magnification, m = -v/u

= -(-0.39)/1.9

= 0.205