Two identically built microscopes are being used to characterize sub-micron features with two different laser sources. The first microscope uses a laser at 632 nm (red), and the smallest feature it can measure is 500 nm. If the second microscope uses a laser at 543 nm (green), what is the smallest feature it can measure

Explanation:

Given:

wavelength used by the first microscope,

resolving power of the first microscope,

wavelength used by the second microscope,

For the microscopes the resolving power is given as:

where:

wavelength of the laser source used

numerical aperture of the microscope

smallest feature that can be distinguished using the optical device

For the first microscope:

Since both the optical device are identically built we will have:

Now for the second optical device:

b.

explanation:

10.0

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .