AIIMS 2004
- Exam
- AIIMS
- Year
- 2004
- Subject
- Physics
- Chapter
- Wave Optics
AIIMS 2004 · Physics · Wave Optics
Sodium lamps are used in foggy conditions because
Sodium lamps are used in foggy conditions because
Options
- Ayellow lightis scattered less by the fog particles
- Byellow light is scattered more by the fog particles
- Cyellow light is unaffected during its passage through the fog
- Dwavelength of yellow light is the mean of the visible part of the spectrum.
Correct answer
A. yellow lightis scattered less by the fog particles
Step-by-step solution
Sodium lamp light emits monochromatic light i.e. it is comprised of only one wavelength (deep yellow). This colour is scattered less in the foggy condition while other light sources produce light at many different discrete wavelengths and all provide some degree of colour rendering. Also sodium lamps emit light very near to the peak sensitivity of the human eye under normal viewing conditions.