Lasers: How Many Photons Per Second Emerge from a Laser

question 11

Multiple Choice

Lasers: How many photons per second emerge from a laser of power with wavelength (c = 3.00 × 10⁸ m/s, h = 6.626 × 10^-34 J ∙ s)

• A) 6.09 × 10¹⁵ photons/s
• B) 5.03 × 10¹² photons/s
• C) 3.07 × 10¹⁵ photons/s
• D) 3.07 × 10¹³ photons/s

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Definitions:

fMRI

Functional Magnetic Resonance Imaging, a neuroimaging technique that measures brain activity by detecting changes associated with blood flow.

Control Groups

Groups in experiments that do not receive the experimental treatment, allowing researchers to assess the treatment's effect by comparing it against this baseline.

Experimental Groups

Groups in an experiment that receive the treatment or variable being tested, allowing researchers to assess its effects.

Representative Sample

A part of a population that accurately represents the entire group's composition.