Question

Skeletal muscle is striated; a microscopic view shows structures called sarcomeres, running vertically in the figure, that are bordered by dark bands. The muscle can thus operate as a reflection grating, and a measurement of the diffraction pattern can give a measurement of the length of the sarcomeres, the distance between the dark bands. If an investigator shone a 632 nm laser on exposed muscle tissue in a man's forearm as he moved his wrist back and forth through a 100° angle, contracting and then stretching the muscle. The resulting diffraction pattern was projected on a screen 2.4 cm from the muscle. The investigator measured the distance between the two fringes on either side of the central maximum. This length varied from 1.9 cm to 2.7 cm. What are the minimum and maximum values of the sarcomere length?

          Skeletal muscle is striated; a microscopic view shows structures
called sarcomeres, running vertically in the figure, that are
bordered by dark bands. The muscle can thus operate as a reflection
grating, and a measurement of the diffraction pattern can give a
measurement of the length of the sarcomeres, the distance between
the dark bands. If an investigator shone a 632 nm laser on exposed
muscle tissue in a man's forearm as he moved his wrist back and
forth through a 100° angle, contracting and then stretching the
muscle. The resulting diffraction pattern was projected on a screen
2.4 cm from the muscle. The investigator measured the distance
between the two fringes on either side of the central maximum. This
length varied from 1.9 cm to 2.7 cm. What are the minimum and
maximum values of the sarcomere length?

Added by Karen P.

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