Multiple choice

In a direct vision spectroscope, one uses

  1. interference without deviation

  2. deviation without interference

  3. deviation without dispersion

  4. dispersion without deviation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A direct vision spectroscope is designed so that the dispersed spectrum is visible without significant deviation of the mean ray. This is accomplished by using multiple prisms (typically flint and crown glass) that disperse light but cancel out overall deviation, allowing direct viewing of the spectrum.

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