In the normal eye the ciliary muscles that control the lens will relax
a. when viewing objects at the near point.
b. when viewing objects at infinity.
c. when viewing objects at a distance of 20 ft.
d. only when a person has his/her eyes closed.
b
You might also like to view...
It is a misconception to imagine that space is empty-a vacuum
Indicate whether the statement is true or false
Compound Microscope: You have a choice between two lenses of focal lengths fa and fb, where fb = 2fa, to use as the objective lens in building a compound microscope. If the magnification you obtain using lens a is Ma, what will be the magnification when using lens b?
A. Mb = 2 Ma B. Mb = 4 Ma C. Mb = 8 Ma D. Mb = Ma/4 E. Mb = Ma/2
A 1000-turn toroid has a central radius of 4.2 cm and is carrying a current of 1.7 A. The magnitude of the magnetic field along the central radius is
A) 8.1 × 10-3 T. B) 5.1 × 10-2 T. C) 1.6 × 10-2 T. D) 8.1 × 10-2 T. E) 0.
Through how many degrees does a 33 rpm turntable rotate in
A) 35° B) 74° C) 63° D) 46°