Question

Which of the following statement is false about double beam absorption instruments?

(a) It is similar to single beam instruments except two beams are present

(b) Tungsten bulb is used as a source

(c) Reference beam must have a higher intensity than sample beam

(d) Both the beams after they pass through respective samples are compared

The question was asked in exam.

This question is from Single Beam and Double Beam Instruments topic in portion Colorimetry and Spectrometry of Analytical Instrumentation

Answer 1

Correct option is (c) Reference beam must have a higher intensity than sample beam

To elaborate: Reference beam cannot have a higher intensity than sample beam. The beam is split into two beams of equal intensity.