A Photon in Light Beam a Has Twice the Energy

question 4

Multiple Choice

A photon in light beam A has twice the energy of a photon in light beam B.The ratio p_A/p_B of their momenta is:

• A)1/2
• B)1/4
• C)1
• D)2
• E)4

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Definitions:

Control Group

In an experiment, the group that is not exposed to the treatment, serving as a comparison point for assessing the effect of that treatment.

Independent Variable

In an experiment, it is the variable that is controlled or changed to test its effects on the dependent variable.

Chocolate

A sweet, typically brown food preparation of roasted and ground cacao seeds, often sweetened and consumed as confectionery.

Medical Placebos

Substances with no therapeutic effect that are used in clinical trials to compare the effects of actual drugs on patients' health conditions.