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UPSC 2008: Which one of the following laser types is used in a laser printer?
(a)Dye laser
(b)Gas laser
(c)Semiconductor laser
(d)Excimer laser
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Not attemptedCorrect Answer: (c) Semiconductor laser
Modern laser printers use a compact infrared diode (semiconductor) laser to write the latent electrostatic image on the photoconductor drum; dye, gas and excimer lasers are not employed in ordinary office printers. ([examrobot.com](https://examrobot.com/content/which-one-following-laser-types-used-laser-printer?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2008 Science & Technology question?▼
The correct answer is option (c): Semiconductor laser. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Physics question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2008, GS Paper 1, as Question 111. It falls under Science & Technology > Physics.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Physics?▼
UPSC has asked 104 questions from Physics (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.