Which is the best description of the light paths necessary to see an object? a) light must travel one path from the source to the eye, and another path from the eye to the object. b) light must travel one path from the object to the source, and another path from the source to the eye. c) light must travel one path from the eye to the source, and another path from the source to the object. d) light must travel one path from the source to the object, and another path from the object to the eye.

Option D,  Light must travel one path from the source to the object, and another path from the object to the eye.

Explanation:

In optical physics it has been established that whatever object/things we are able to see is because of the light reflected by the object. Thus, it is clear that either the object must throw light of itself or it should have a source of light whose light can be reflected by object. The reflected light from object then reaches the eye of the viewer and he/she visualizes the object.

Thus, option D is correct.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.