Question

1. Explain in details Diffraction, Refraction, and Reflection

2. Explain in detail monochromators and components of monochromators

3. Explain in detail all sample introduction methods for liquid samples in optical atomic spectrometry

4. Explain in detail the interferences in Atomic Absorption Spectroscopy

5. Explain in detail the plasma sources in Emission Spectroscopy

6. Why does a deuterium lamp produce a continuum rather than a line spectrum in the ultraviolet?

7. Explain the relation between the molecular orbital theory and electron transition in UV–Vis range

8. What are the component of mass spectrometry, and explain the role of each part?

9. Discuss in detail the source of the spectroscopy interference in atomic mass spectra

10. When the atom strike by X-ray radiation, how this would affect on the potential energy and binding energy of the atom.

Answer 1

1) Diffraction - When waves encounter an obstacle Or slit whose dimensions are comparable to wavelength of light, it gets turned from the corner and enters in the region of geometrical shadow.

Refraction- When travels from one medium to another it deviates from its path (bend towards the normal when enters denser medium, and bend away from the normal when enters rarer medium). This phenomenon is known as reflection. Reflection is because of the difference in speed of wave in the two medium.

Reflection - When light encounters a surface it get back to the same medium. This phenomenon is known as reflection of light.