Answer to Question 1
ANS: A
Resolution is the ability to distinguish between two objects that are situated closely together as two distinct entities. Contrast makes an image sharper (i.e., clearer), but does not affect resolution. If lenses are parfocal, then moving from one objective to another will require only minor adjustments in the fine focus. If they are parcentric, then an object in the center of one field using one lens will be close to the center when another objective is moved into position.
Answer to Question 2
ANS: A
A commercial glass cleaning solution is best used for cleaning lenses. Water will often only smudge anything present, especially on an oil immersion lens. Benzene and xylol are solvents that are carcinogenic and should not be used.
Differently shaped objects were placed in the nests of robins and catbirds.
Our species’ ability to form social bonds and be loyal and cooperative within our “tribe” may ...
Close-up view of a diaphragm amplifier on the left and a bell amplifier on the right
To cleanse an open wound, begin close to the wound and work outward in full or half circles.
(A) In hyperopia, light rays focus behind the retina, making it difficult to focus on objects at ...
Segregation of two genetic markers, lying on separate chromosomes (top) or on the same chromosome