Discussion
Which source is used for the visible region?
Answer: B
A tungsten filament gives a smooth continuum from about 320 nm well into the infrared, which covers the visible region completely. Deuterium is the ultraviolet source, a hollow cathode lamp belongs to atomic absorption, and a Nernst glower is an infrared source. Since no single lamp covers the whole range usefully, an instrument spanning ultraviolet and visible switches between two and the changeover wavelength is one of its specifications. Most errors here come from carrying a result across from a neighbouring case where it does not hold.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development