Biologists know that chlorophyll, the pigment responsible for photosynthesis in plants, absorbs red light. Describe and design a
machine that could test for the presence of chlorophyll.

Work = force × a. work b. energy c. distance d. momentum

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2