Mary Patricia
New member
Exercise 5: Manish is in a house of mirrors with one of his friends when he comes to two
mirrors situated at an angle of 90°. Manish stands so that light shining on his
face is incident on one mirror at an angle of 50°, as shown. At what angle will
this light reflect from the second mirror?
Answer:
Exercise 6: A popular lawn ornament in the 1960s was a colored reflecting sphere that sat
in the yard as a decoration. a) If a bird is 10.0 cm from a blue reflecting sphere
and sees its image reflected 5.0 cm behind the sphere, what is the focal length
of the spherical reflector? b) Would the bird’s image appear larger or smaller
than the bird itself?
Exercise 7: Polly applies her mascara while looking in a concave mirror whose focal
length is 18 cm. She looks into it from a distance of 12 cm. a) How far is
Polly’s image from the mirror? b) Does it matter whether or not Polly’s face is
closer or farther than one focal length? Explain.
Exercise 8: A friend is wearing a pair of mirrored sunglasses whose convex surface has a
focal length of 20.0 cm. If your face is 40.0 cm from the sunglasses, how far
behind the sunglasses is your image?
mirrors situated at an angle of 90°. Manish stands so that light shining on his
face is incident on one mirror at an angle of 50°, as shown. At what angle will
this light reflect from the second mirror?
Answer:
Exercise 6: A popular lawn ornament in the 1960s was a colored reflecting sphere that sat
in the yard as a decoration. a) If a bird is 10.0 cm from a blue reflecting sphere
and sees its image reflected 5.0 cm behind the sphere, what is the focal length
of the spherical reflector? b) Would the bird’s image appear larger or smaller
than the bird itself?
Exercise 7: Polly applies her mascara while looking in a concave mirror whose focal
length is 18 cm. She looks into it from a distance of 12 cm. a) How far is
Polly’s image from the mirror? b) Does it matter whether or not Polly’s face is
closer or farther than one focal length? Explain.
Exercise 8: A friend is wearing a pair of mirrored sunglasses whose convex surface has a
focal length of 20.0 cm. If your face is 40.0 cm from the sunglasses, how far
behind the sunglasses is your image?