Optics 2

Discuss the deference between Laser and LED as a transmitter inoptical communication

CLASS B Q1: Why different semiconductor materials have different wavelength output? Q2: What are the three main necessary characteristics that need to be possessed in order to qualify as a good optical detector?

The wave power per length is 1407 W/m, the device-width of the wave energy system is 7.5 m, the capture width ratio is 0.4, the rated power is 12772 W. Determine the percentage degree of utilization. 29.74 28.09 33.05 O 36.35

Which of the following methods could be applied to reduce the threshold current density of a diode laser? (There may be more than one correct option) increase the temperature increase the length of the device reduce the spatial overlap of the optical mode with the intrinsic region reduce internal losses within the waveguide Apply high reflectivity coatings to the end facets

Which statement(s) is(are) true for photomultiplier tubes?I     Photomultiplier tubes are very sensitive detectors, amplifying the photoelectron current by approximately 1 million.II     Emitted photoelectrons are accelerated toward positively charged electrodes called dynodes.III     Electrons strike the dynode with a kinetic energy less than the original emitted kinetic energy.IV     For each electron striking a dynode, more than one electron is knocked free. The additional electrons are accelerated toward the next dynode in the detector where amplification is repeated. Select one: a. II, III, and IV b. II c. I, II, and IV d. II and III e. I and IV

How we can classify optical fibers

4/. The cathode ray oscilloscope is used to display the applied ____________ in the output terminals. ac or dc signal current capacitance resistance

All electronics components are formed from p-type and n-type materials. what factors determine the kind of components formed?

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Write extensively on Hollow-Cathode Lamp and its uses.

is the simplest way of producing a source of lower EME from a source of higher EMF.

Draw the energy band structure of a conductor and a semiconductor material.

Give three different examples of beam instrumentation that can be used to measure the emittance of an electron beam, and explain briefly the operating principle of each type of instrument.

Ims.cisjubail.gov.sa/webapps/assessment/take/launch.jsp?course_assessment_id%3 34730_1&course_id%3_56188 18content id%3 1713242 1 Ta Remaining Time: 46 minutes, 48 seconds. Question Completion Status: -30V- QUESTION 6 Determine whether each silicon diode in the following figure is forward biased (fb) or reversed biased (rb) Using the practical model, the voltage across the diode is V. 10 N 5V 5V Click Save and Submit to save and submit. Click Save All Answers to save all answers.

Theoretical calculations: 1. How can you draw the spectrum of EM?

POWER SISTEMS high voltage technlque it is possible to measure pulsed (AND ANSWER THE SAME QUESTION FOR AC AND DC ) high voltages with the help of two spheres of equal radius placed on the same axis. In which case the approxlmate pulse voltage for pulse hlgh voltage , approxlmate voltage value for DC voltage , AND effective value for AC VOLTAGE voltage value that can be measured with such a system with diameters of 500 mm and known spacing between them is 2.5 cm, is given correctly. (Ambient conditions are neglected and take Ed = 30 kV / cm2 k = 0.9) a) 68,65114 kV b) 81.30081 kv c) 97,08737 kv d) 65,35947 kv e) 57.48835 kv f) 46.21612 kv PLEASE ANSWER THE THREE EQUESTION AND THE OPTIONS ARE THE SAME approxlmate pulse voltage for pulse hlgh voltage, approxlmate voltage value for DC voltage , AND effective value for AC VOLTAGE

discuss how it is possible to use an LED as an illumination source and detector.

In CRO, the assembly of the cathode, intensity grid, focus grid and is called as Electron gun. O accelerating anode O Deflection Plates O Fluorescent screen O Trigger circuit

Electromagnetic circuit board

Explain this image in basic terms.

Mask design. Silicon solar cell is made of Al thin-film electrodes on silicon using lift-off technology. The linewidth of Al electrode is 10 μµm and the spacing between the adjacent electrodes is 30 µm, diameter of the ring is 500 µm. There are two contact areas, 100 x 100 µm at the end of each electrode. Draw a mask, mark down the dimensions, and clearly indicate the tone (clear or opaque) of each region on the mask. Contact Aluminum thin film electrode Silicon

Discuss some problems that might result from developing facilities for conversion of wave energy to electrical energy.

Calculate the drift velocity of silicon at room temperature and when the magnitude of the electric field is 500 V/m.

What are some of the benefits and drawbacks of using raytracing in comparison to more traditional techniques to local lighting?

True or False (No need for explanation)   1. LDR is an energy source whose output voltage varies in relation to the light intensity at its surface. 2. A thermistor is a two dissimilar metal alloys, joined in one end that measures temperature by the voltage across two other ends. 3. The error etween effective input and source voltage reflect the overall sensitivity of the system.