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<a href="https://www.dcu.ie/physics/people/enda-mcglynn">Enda McGlynn</a>, from the School of Physics, describes what a semiconductor is, when they were discovered, and examples of how they are used. <br>
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4: What is a Black Hole?

Scientists from Dublin City University answer scientific questions in ordinary language in two minutes. If you have a question for us, get in touch with the podcast producer, Seán Duke, email: sean.duke@dcu.ie