In the process of performing an analysis, you determine that you need to improve the precision by limiting the error in the absorbance to 9.400 x 10. You attempt to achieve this by reducing the amount of stray light that reaches the detector. What is the maximum amount of stray light that can reach the detector that will limit the error in the absorbance to 9.400 x 10° for a true absorbance of 1.0000000? s = 2.22 x10-5 % Incorrect

A certain device for analyzing electromagnetic radiation is based on the Bragg scattering of the radiation from a crystal. For radiation of wavelength 0.149 nm, the first-order Bragg peak appears centered at an angle of 15.15°. The aperture of the analyzer passes radiation in the angular range of 0.015°. What is the corresponding range of wavelengths passing through the analyzer?

A GaAs DH injection laser (refractive index: 3.6) has an optical cavity of length 50 μm and width 20 μm. At normal operating temperature (300 K) the loss coefficient is 10 cm-1, the mirror reflectivity at each end of the optical cavity is 0.3 and the gain factor for the device is 3.76x10-2 cm/A. The device emits at a wavelength of 870 nm. 1.1 Calculate the frequency separation of the longitudinal modes and the number of longitudinal modes emitted by the device. 1.2 Determine the current threshold for the device at 300 K. 1.3 Determine the required threshold current when the diode is operated at a temperature of 60˚C.

Q30: Find the pulse duration and bandwidth if the range resolution is 0.15 m. (ans: 1 nsec, 1 GHz)