D: sound
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Which diagram shows an example of a longitudinal wave?
A hospital needs to sterilise medical equipment. Which electromagnetic waves could be used?
A flash of lightning and the corresponding sound of the thunder are detected 6s apart. A student calculates that the …
A ray of light strikes a plane mirror and is reflected. Which pair of angles must be equal in value?
In which diagram is the path of the light ray not correct?
The ray diagram shows two rays from a point on an object placed in front of a diverging (concave) lens. What are the …