A Thin Beam of Laser Light of Wavelength 514 Nm

question 36

Multiple Choice

A thin beam of laser light of wavelength 514 nm passes through a diffraction grating having 3952 lines/cm.The resulting pattern is viewed on a distant curved screen that can show all bright fringes up to and including ±90.0° from the central spot.If the experiment were performed with all of the apparatus under water (which has an index of refraction of 1.33) ,what would be the TOTAL number of bright spots that would show up on the screen?

• A) 6
• B) 7
• C) 12
• D) 13
• E) 14

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Definitions:

Range

The difference between the highest and lowest scores in a set of data, indicating the spread of scores.

p < .05

A statistical term indicating that the probability of the observed data, or more extreme, if the null hypothesis were true, is less than 5%, often used as a threshold for statistical significance.

Experimental Group

In research, a group of subjects who receive the treatment or variable being tested for its effect.

Control Group

The group in an experiment or study that does not receive the experimental treatment, serving as a baseline for comparison with the experimental group.