1、電離輻射鉛門是一切能引起物質電離的輻射，而電磁輻射是由空間共同移送的電能量和磁能量所組成。
2、電(dian)離輻(fu)(fu)(fu)射(she)(she)存在于(yu)(yu)自然(ran)(ran)界，但目前人工(gong)輻(fu)(fu)(fu)射(she)(she)已遍及各(ge)個(ge)領域，專門(men)從事(shi)生產、使用及研究電(dian)離輻(fu)(fu)(fu)射(she)(she)工(gong)作(zuo)的，稱為放射(she)(she)工(gong)作(zuo)人員。而電(dian)磁(ci)輻(fu)(fu)(fu)射(she)(she)的來(lai)源(yuan)有(you)多種。人體內外均(jun)布滿由(you)天然(ran)(ran)和(he)人造輻(fu)(fu)(fu)射(she)(she)源(yuan)所發出的電(dian)能(neng)量和(he)磁(ci)能(neng)量；閃電(dian)便是天然(ran)(ran)輻(fu)(fu)(fu)射(she)(she)源(yuan)的例(li)子(zi)之一。至于(yu)(yu)人造輻(fu)(fu)(fu)射(she)(she)源(yuan)，則包括微波爐、收(shou)音機(ji)、電(dian)視廣播發射(she)(she)機(ji)和(he)衛星通(tong)訊裝(zhuang)置等。
3、電離輻(fu)射(she)(she)對人體內組織(zhi)破壞能(neng)力較大。由(you)于其質量較大，穿透(tou)能(neng)力差，在(zai)空氣中的(de)射(she)(she)程只有(you)及厘(li)米，只要一張紙或健康的(de)皮膚就能(neng)擋(dang)住(zhu)。電磁(ci)輻(fu)射(she)(she)就不一樣(yang)了(le)， 電磁(ci)輻(fu)射(she)(she)對人體的(de)危害十分大，1999年(nian)5月8日閉幕的(de)全國電磁(ci)輻(fu)射(she)(she)環(huan)境污染源的(de)現狀：廣播電視發(fa)(fa)射(she)(she)設備共10235臺，總(zong)功率(lv)130萬千瓦；工科醫療設備共15335臺，地球衛星(xing)3個(ge)，大哥大基站總(zong)數(shu)近萬個(ge)；空中蛛網一樣(yang)的(de)高壓輸(shu)變電線(xian)等都(dou)在(zai)向外(wai)發(fa)(fa)射(she)(she)泄漏電磁(ci)波。
4、電(dian)(dian)(dian)(dian)磁輻(fu)(fu)射(she)(she)(she)(she)(she)的(de)強(qiang)(qiang)度與兩(liang)個因(yin)(yin)素(su)密(mi)切相關，即距(ju)離和時(shi)(shi)(shi)間。日常生(sheng)活中使(shi)用(yong)(yong)電(dian)(dian)(dian)(dian)器時(shi)(shi)(shi)要注(zhu)意一(yi)些方法，也(ye)能起(qi)到防輻(fu)(fu)射(she)(she)(she)(she)(she)效果。比(bi)如，不(bu)(bu)要把家用(yong)(yong)電(dian)(dian)(dian)(dian)器擺放得過(guo)于集(ji)中或經(jing)常在(zai)一(yi)起(qi)使(shi)用(yong)(yong)。在(zai)臥室(shi)里盡量不(bu)(bu)要擺放電(dian)(dian)(dian)(dian)腦、電(dian)(dian)(dian)(dian)冰箱等電(dian)(dian)(dian)(dian)磁輻(fu)(fu)射(she)(she)(she)(she)(she)較強(qiang)(qiang)的(de)家電(dian)(dian)(dian)(dian)。使(shi)用(yong)(yong)電(dian)(dian)(dian)(dian)腦時(shi)(shi)(shi)，要與電(dian)(dian)(dian)(dian)腦屏(ping)幕(mu)(mu)保持適當距(ju)離，較好是在(zai)0.5米以外，距(ju)離越(yue)(yue)近(jin)，輻(fu)(fu)射(she)(she)(she)(she)(she)越(yue)(yue)強(qiang)(qiang)。屏(ping)幕(mu)(mu)亮度也(ye)不(bu)(bu)要調得過(guo)高，屏(ping)幕(mu)(mu)越(yue)(yue)亮，輻(fu)(fu)射(she)(she)(she)(she)(she)越(yue)(yue)強(qiang)(qiang)。使(shi)用(yong)(yong)電(dian)(dian)(dian)(dian)腦后應及(ji)時(shi)(shi)(shi)洗臉洗手，因(yin)(yin)為電(dian)(dian)(dian)(dian)腦顯示器表(biao)面存(cun)在(zai)著大(da)量靜(jing)電(dian)(dian)(dian)(dian)，其(qi)聚集(ji)的(de)灰塵會(hui)落(luo)到皮膚裸露處。另外，接(jie)手機(ji)時(shi)(shi)(shi)不(bu)(bu)要急。手機(ji)在(zai)接(jie)通(tong)瞬間以及(ji)充(chong)電(dian)(dian)(dian)(dian)時(shi)(shi)(shi)通(tong)話，釋放的(de)電(dian)(dian)(dian)(dian)磁輻(fu)(fu)射(she)(she)(she)(she)(she)較大(da)，較好在(zai)按下接(jie)通(tong)鍵兩(liang)三秒再接(jie)聽。