Question

The process by which heat travels without the help of a
material medium is called​

Answer 1

Answer:

Radiation

Explanation:

In radiation, heat travels between two points without conductive material. This is how we receive heat from the sun.

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Answer 2

The process by which heat travels without the help of any medium or material is called radiation. This does not needs a medium it travels in the form of electromagnetic waves. It is harmful for us. It can even kill us, it damages our DNA.

Radiation is of 4 types :-

alpha

beta

neurons

electromagnetic waves.

Radiation is also used as a therapy for curing cancer.

Hope it will help you...