Question

A certain Christmas tree ornament is a silver sphere having a diameter of 3.22 cm. (a) If the size of an image created by reflection in the ornament is one-half the reflected object's actual size, determine the object's location.

Answer #1

An object is 12.2 cm from the surface of a reflective spherical
Christmas-tree ornament 7.31 cm in diameter.
(a) What is the position of the image? Answer in units of
cm.
(b) What is the magnification of the image?

If you look at yourself in a shiny Christmas tree ball with a
diameter of 9.0·cm when your face is 20.0·cm away from it, where is
your image? (Your answer should be positive if the image is in
front of the ball's surface, and negative if the image is behind
it.)
cm (from the ball's surface)
Describe the image. Choose one answer only.
real and upright
real and inverted virtual and
upright
virtual and inverted
How large will the image...

1.
Thirty-five years ago, a green laser might cost $100,000 and occupy
a table. Today, you can buy one the size of a ball point pen for
around $15. A green laser pointer has a beam power of 5.00 mW at a
wavelength of 532 nm. Imagine that a lens is then used to focus the
beam of such a laser to a circular spot 1 mm in diameter. Calculate
(a) the intensity of the focused beam and (b) the...

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