I am nearsighted and wear -2.25 diopter contact lenses
for distance vision. without the contact lenses how far can I
see?
0.22m
0.56m
0.33m
0.67m
0.44m
In a single slit diffraction experiment, the
wavelength of electrons is cut in half. Assuming that the angles are
small, by what factor will the width of central bright spot
change?
It will become one quarter as large
it will become two times as large
It will become four times as large
It will become 8 times larger
It becomes one half as large
I am nearsighted and wear -2.25 diopter contact lenses for distance vision. without the contact lenses...
A single-slit diffraction pattern is formed on a distant screen. Assuming the angles involved are small, by what factor will the width of the central bright spot on the screen change if the slit width is cut in half? A) It will become eight times as large. B) It will double. C) It will be cut in half D) it will be cut to one-quarter its original size. E) It will become four times as large.
1. I am nearsighted and looking for contact lenses which will correct my vision. I should select: a. A diverging lens, characterized by a negative focusing power b. A converging lens, characterized by a negative focusing power c. A diverging lens, characterized by a positive focusing power d. A converging lens, characterized by a positive focusing power 2. I have a glass lens (index of refraction 1.5) with a concave side with radius of curvature 2 m and a convex...