Question

define radiation........!!​

Answer 1

Answer:

powerful and very dangerous rays that are sent out from certain substances. You cannot see or feel radiation but it can cause serious illness or death

कुछ पदार्थों से निकलकर फैलने वाली शक्तिशाली और ख़तरनाक किरणें (इन्‍हें हम देख या महसूस नहीं कर सकते परंतु इनसे गंभीर रोग या मृत्‍यु हो सकती है)

Answer 2

Explanation:

Radiation is energy that comes from a source and travels through space and may be able to penetrate various materials. ... The kinds of radiation are electromagnetic (like light) and particulate (i.e., mass given off with the energy of motion). Gamma radiation and x rays are examples of electromagnetic radiation

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