User: The greenhouse effect is a result of A. absorption and radiation of energy in the hydrosphere. B. consumption of fruits and vegetables that produce a biofuel. C. absorption and radiation of energy in the atmosphere.
A principal focus or focal point is a special focus: 1  For a lens, or a spherical or parabolic mirror, it is a point onto which collimated light parallel to the axis is focused. Since light can pass through a lens in either direction, a lens has two focal pointsâone on each side.
The Focus Room. A Point of View Researchâs Focus Group Facility is spacious, private, convenient, and fully-furnished. With a large comfortable group room and fully-furnished, tiered viewing room, the Focus Room provides the latest technological advancement in HD audio/video recording and in house video streaming capabilities.