An incandescent lamp is operating at a temperature of 1000K at an oper – McqOptions

MCQOPTIONS

1.	An incandescent lamp is operating at a temperature of 1000K at an operating frequency of 5.2×1014 Hz. Calculate the ratio of stimulated emission rate to spontaneous emission rate.
A.	3×10-13
B.	1.47×10-11
C.	2×10-12
D.	1.5×10-13
Answer» C. 2×10-12

Discussion

No Comment Found

Related MCQs

An incandescent lamp is operating at a temperature of 1000K at an operating frequency of 5.2×1014 Hz. Calculate the ratio of stimulated emission rate to spontaneous emission rate.
A GaAs injection laser has a threshold current density of 2.5*103Acm-2 and length and width of the cavity is 240μm and 110μm respectively. Find the threshold current for the device.
The ring and star topologies are combined in a configuration.
As compared to planar LED structure, Dome LEDs have External power efficiency effective emission area and radiance.
may be used for measurement of the absolute optical attenuation on a fiber link.
When considering source-to-fiber coupling efficiencies, the is an important parameter than total output power.
Almost of the transmitter power is wasted in the use of external modulators.
compensates for distortion of the signal due to the combined transmitter, medium and receiver characteristics.
A single mode fiber has mode field diameter 10.2μm and V=2.20. What is the core diameter of this fiber?
in the laser occurs when photon colliding with an excited atom causes the stimulated emission of a second photon.