Thermogravimetry is the technique in which change in the weight is recorded as the function of temperature Or time. The phenomenon is used for qualitative as well as quantitative analysis.
You are given a concave mirror of focal length 50cm. How will you place an object in front of it, so that an image of double its size is obtained.
Solution: As we have a concave mirror focal length is negative, $$ \therefore f
What are Photoelectric colorimeters? Describe the Double beam photoelectric colorimeter.
Double beam photoelectric colorimeters are the instrument with the help of which 
What are Dispersing Devices (Monochromators)?
Monochromator are the dispersing devices used in spectroscopy, Monochromator prod
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