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Why can't gamma rays pass through concrete?

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Gamma rays can pass through concrete. To effectively stop gamma rays from passing through, we need thicker walls of concrete. Gamma radiation can travel for many meters so it requires a material much thicker to absorb it. read more

Gamma rays can pass through concrete. To effectively stop gamma rays from passing through, we need thicker walls of concrete. Gamma radiation can travel for many meters so it requires a material much thicker to absorb it. For example, many centimetres of lead or many meters of concrete will absorb gamma radiation. read more

The reason why visible light can't travel through walls as easily as gamma rays or radio waves is because, to the visible light, there's something 'there' on a similar scale of length (wavelength) and time (frequency) that the gamma rays are too small and fast to interact with and the radio waves are too large and slow to interact with. read more

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