Passage II
A hologram is a three-dimensional image produced when light from a laser shines on a film coated with a material called a holographic emulsion. The laser provides the light at a specific wavelength.
The figure below shows the light energy per unit area (in ergs/cm2) required to create a hologram on 3 different emulsions using gas lasers. For example, an Ar laser must produce 100 ergs/cm2 to create a hologram on Emulsion 2. The figure also shows how the sensitivity to light of each emulsion and the light energy per unit area required to create a hologram on each emulsion vary with the wavelength of light used.
8. Based on the figure, as wavelength increases from 550 nm to 650 nm, the sensitivity of Emulsion 1:
Your Answer is
Correct Answer is F
Explanation
Looking at the picture, as the abscissa increases from 550 to 650, the ordinate of Emulsion 1 is increasing.