1.

The expression relating the wavelength of the radiation and the angle (q) at which it is reflected is given by _________(a) ml = 2d sin q, where l= lambda(b) m = 2d sin q(c) ml = d sin q, where l= lambda(d) m = d sin qThe question was posed to me during an interview.My doubt is from Methods of Monitoring Foetal Heart Rate topic in portion Foetal Monitoring Instruments of Biomedical Instrumentation

Answer»

The correct answer is (a) ml = 2d SIN Q, where L= lambda

To explain I would say: The expression relating the wavelength of the radiation and the angle (q) at which it is reflected is given by

ml = 2d sin q, where l= lambda.

where d is the distance separating the grooves and is known as the grating constant and m is the order of interference.

When m = 1, the SPECTRUM is known as first order and with m = 2, the spectrum is known as second order.


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