(i) Name the electromagnetic wave that scans the contents of the luggage of a traveller during a…
(i) Name the electromagnetic wave that scans the contents of the luggage of a traveller during a security check.
(ii) Which physical quantity is the same for UV rays, red light and radio waves when they are travelling in vacuum?
(i)[1.0]
Name the electromagnetic wave that scans the contents of the luggage of a traveller during a security check.
(ii)[1.0]
Which physical quantity is the same for UV rays, red light and radio waves when they are travelling in vacuum?
Answer
Answer (i)
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X-rays are used to scan the contents of luggage during security checks.
Answer (ii)
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Speed in vacuum (the speed of light, $c = 3 \times 10^{8}\text{ m s}^{-1}$) is the same for all electromagnetic waves.
From ISC 2026 Physics Paper 1, question 7.