You are given two converging lenses to build a compound microscope. Lens A has focal length 0.50 cm and lens B has focal length of 3.0 cm. Which one of the two lenses would you use for the objective?
A) Lens A, because it has the shorter focal length.
B) Lens B, because it has the longer focal length.
C) It makes no difference which lens I use for the objective.
D) None, because the objective should be a diverging lens.
A
You might also like to view...
A block attached to an ideal spring of force constant (spring constant) 15 N/m executes simple harmonic motion on a frictionless horizontal surface
At time t = 0 s, the block has a displacement of -0.90 m, a velocity of -0.80 m/s, and an acceleration of +2.9 m/s2 . The mass of the block is closest to A) 2.3 kg B) 2.6 kg C) 4.7 kg D) 9.4 kg
Rotational Dynamics: The rotating systems shown in the figure differ only in that the two identical movable masses are positioned a distance r from the axis of rotation (left), or a distance r/2 from the axis of rotation (right). If you release the hanging blocks simultaneously from rest, and call tL the time taken by the block on the left and tR the time taken by the block on the right to reach the bottom, respectively, then
A. tL > tR. B. tL = tR. C. tL < tR.
The imaginary line encircling Earth at its surface, halfway between the north and south geographic poles, is called the
a. meridian. b. equator. c. International Date Line. d. longitude. e. latitude.
Species are groups of organisms
A) with a common ancestor B) that are genetically distinct C) that look similar D) that are capable of interbreeding with one another