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Explain Light source - Pre-requisites of Colour Perception
No colour may be detected by the eyes or by an instrument in the dark i.e. in the absence of a light source emitting radiant energy in the visible range of the spectrum. Wrong results will be obtained if the light source is not emitting sufficient radiant energy at the critical wavelength. To avoid this, three standard illuminants i.e. light sources have been established by the International Commission of Illumination. These are:
Illuminant A i.e. Incandescent lamp (2844°K)
Illuminant B i.e. noon sunlight (4000°K)
Illuminant C i.e. cloudy daylight (6800°K)
PROCEDURE Locate the gas cylinders available in the lab. Note the colour of the cylinder (to a maximum of two and exclude the LPG) and bands on it (if any) and record them i
Discuss main factors that influence mass movements. Ans) Things as if climate and food availability will make a big dissimilarity if it is too cold, too dry then people will re
Explain Isoelectric pH Isoelectric pH: Many ionizable groups are present in a protein molecule. Depending on the pH of the medium, some of these groups act as proton
Explain Adventitia or Outer Covering In the thorax, the outer covering is made up of loose fibrous tissue and in the abdomen, the organs are covered through a serous membrane k
Botany: In the Bronze and the Iron Ages, agriculture became the principal mode of production of man in all lands. It is, thus, not surprising that in India, botany and elementa
Comment on their location in the sky (constellation, relative altitude over the horizon, etc) and track their movement above the course of the next couple of weeks, every day comme
what are th precuotionarymeasures signs,symbols
Occurrence and characteristics of earthquakes
Essential nutrients: Our body is a biochemical factory which can make many compounds for its needs. However, there are limits to this, and what our body cannot make has to be
Explain Nasal secretions and Cerumen Nasal secretions: These can destroy harmful organisms due to lysosomal activities. Cerumen (wax of ear): It traps and kills the bacteria
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