Asked by Jon

1)At least_____ light rays are required to locate the image formed by a lens.

2

2)What is the nature of an image formed by a concave mirror of focal length 10 cm for a real object placed 3 cm from the mirror?

Real and inverted
Answered by drwls
2) is wrong. Objects placed inside the focal length distance do not form real images.
1/d_o is larger than 1/f.

Try computing d_i for that one.
Answered by Bea
What type of lens was used in our activity as shown below?
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