A person's eye lens is 2.7 cm away from the retina. What must the focal length of this lens be in order for an object placed at the near point (N = 25.0 cm) of the eye to focus on the retina?
A) -3.4 cm
B) -2.4 cm
C) 2.4 cm
D) 3.4 cm
E) 2.6 cm
C
You might also like to view...
How do the size and mass of Jupiter's core compare to the size and mass of Earth?
A) It is the same size and mass.
B) It is about 10 times larger in size and the same mass.
C) It is about the same size but is 10 times more massive.
D) It is about 10 times larger both in size and mass.
E) Jupiter doesn't have a core—it is made entirely from hydrogen and helium.
There are ground-based telescopes much larger than Hubble, yet the HST still reveals the faintest objects yet seen. Explain
What will be an ideal response?
A 50.00 ml sample of mercury at room temperature (293.0 K) is cooled. What is the volume of the sample when the mercury reaches 273.0 K? The coefficient of volume expansion of mercury is 182.0 x 
A. 49.39 ml B. 49.94 ml C. 49.82 ml D. 48.18 ml E. 49.96 ml
The parallax of the star 75 Leo is 0.10 and its apparent visual magnitude is +5.18 . The absolute visual magnitude of 75 Leo is ____________________
Fill in the blank(s) with correct word