Rays of light incident on a lens and parallel to the principal axis of the lens converge
a. at the focal point of the lens.
b. at the center of curvature of the lens.
c. in front of the lens.
d. in back of the lens.

Avery long solenoid of inner radius 2.75 cm creates an oscillating magnetic field of the form = for this solenoid, =0.00425 t and =319 rad/s. (a)what is the maximum value of the induced electric field at a perpendicular distance 1.45 cm from the axis of the solenoid? (b) what is the maximum value of the inducted electric field at a point 5.85 cm perpendicular from the axis of the solenoid?

What is the major limitation to the light microscope?

What component of earth’s atmosphere exists entirely as a result of photosynthesis?