What is the primary advantage of LED technology over traditional incandescent lighting ?
Longer lifespan
Longer lifespan option is correct.
Light-emitting diodes generate light by radiative recombination of electrons and holes across the bandgap of a direct-gap semiconductor, whereas an incandescent bulb heats a tungsten filament to about \(2700\,\text{K}\) so it emits mostly as a black-body radiator. Because there is no filament to sublimate or thermal-cycle to failure, an LED’s useful life is typically 25 000 to 50 000 hours — roughly 25–50 times that of a 1000-hour incandescent lamp.
Solid-state emission is also intrinsically far more efficient: about 90 % of the electrical energy in an incandescent lamp is dissipated as heat, while a modern LED converts a much larger fraction to visible photons and hence has lower power consumption, not higher. The distractor claims higher power consumption, limited colour options and lower efficiency are the exact opposite of LED behaviour, since LEDs are actually offered in a wide range of colours (by choice of semiconductor bandgap and phosphors) and outperform incandescents on efficiency.
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Important Questions from Mixed Topic (MH-SET)
.................... is a client server application that identifies each host on the internet with a unique user-friendly name.
Every OS has a ................ or .......... which primarily resides in the main memory of the computer to perform some of the basic functions of the OS.
(i) Kernel
(ii) Interface
(iii) Nucleus
(iv) Compiler
Codes:
Which of the following are referred to as low level language?
(i) Machine language
(ii) Assembly language
(iii) High level language
(iv) Natural language
Codes:
Match the following:
List I List II (a) New York Public Library (i) Shelv AR (b) Miami University Augmented Research Group (ii) Smart library (c) Oula University Library (iii) Wolf Walk (d) North Carolina State University (iv) Find the future Codes:
Which part of the QR code represents the encoded data?
