In the most widely used beam splitter, a thin film of . . . . . . . . is sandwiched between two plates of low refractive index solid. Fill the blank with a suitable option.

Which of the following could be used as the layer of dielectric in interference filters used in Absorption Spectroscopy?

A. Graphite

B. MgF₂

C. Fe

D. AgNO₃

In Atomic Absorption Spectroscopy, with what material is the cathode in Hollow cathode lamp constructed?

A. Tungsten

B. Quartz

C. Element to be investigated

D. Aluminium

Atomic absorption spectroscopy is also called as Absorption Flame Photometry.

A. True

B. False

Transmittance is given as $$T = \frac{P}{{{P_o}}}.$$  If Po is the power incident on the sample, what does P represent?

A. Radiant power transmitted by the sample

B. Radiant power absorbed by the sample

C. Sum of powers absorbed and scattered

D. Sum of powers transmitted and reflected