Which Statement About Light Is True

question 153

Multiple Choice

Which statement about light is true?

• A) An absorption spectrum is a plot of biological effectiveness versus wavelength.
• B) An absorption spectrum may be a good means of identifying a pigment.
• C) Light need not be absorbed to produce a biological effect.
• D) A given kind of molecule can occupy any energy level.
• E) A pigment loses energy as it absorbs a photon.

Distinguish between different research designs (e.g., experimental, correlational, quasi-experimental, longitudinal).

Understand the concept of operational definitions and their role in linking theoretical concepts to measurable variables.

Interpret the direction and nature of correlation between variables.

Acknowledge potential confounds in research studies and the importance of controlling for third variables.