A cell phone is placed 40 cm in front of a converging lens with a focal length of magnitude 20 cm. How far is the image of this phone from the lens?
A) 10 cm B) 13 cm C) 60 cm D) 20 cm E) 40 cm
E
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An object that has zero resistance is a __________
Fill in the blank(s) with correct word
An object 3.4 mm tall is placed 25 cm from the vertex of a convex spherical mirror. The radius of curvature of the mirror has magnitude 73 cm. (a) How far is the image from the vertex of the mirror? (b) What is the height of the image?
What will be an ideal response?
The figures below represent interference fringes. The distances from the screen to the slits is the same for each figure, and the planes of the screen and the slits are parallel. Which figure(s) represent(s) slits with the smallest spacing d between the slits? The white spaces represent the interference maxima
a.
I.
b.
II.
c.
III.
d.
IV.
e.
V.
Coulomb's law is similar in form to
A. all of Newton's laws of motion B. Newton's law of gravity C. Ohm's law D. Faraday's law