Particle in a Box: One Fairly Crude Method of Determining

question 2

Multiple Choice

Particle in a box: One fairly crude method of determining the size of a molecule is to treat the molecule as an infinite square well (a box) with an electron trapped inside, and to measure the wavelengths of emitted photons. If the photon emitted during the n = 2 to n = 1 transition has wavelength 1940 nm, what is the width of the molecule? (c = 3.00 × 10⁸ m/s, h = 6.626 × 10^-34 J ∙ s, m_el = 9.11 × 10^-31 kg)

• A) 1.33 nm
• B) 1.12 nm
• C) 1.21 nm
• D) 1.45 nm

Understand the anatomical location and function of cerebrospinal fluid around the spinal cord.

Identify the structural enlargements of the spinal cord and their significance.

Differentiate between various structures of the spinal cord, including roots and horns, and their functions.

Recognize the anatomy of the spinal cord, including the conus medullaris and the attachments anchoring the spinal cord.

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