(c) In a lab, a protecting layer is needed on a casing of a device to shield the incident radiation. A coating material has a reflectivity of 0.15 and an absorption coefficient (a) of 100 cm!. Design a shield coating layer that will permit only 0.5% of the incident radiation to be transmitted through the coating. [Dalam makmal, satu lapisan pelindung diperlukan pada selongsong peranti untuk melindungi sinaran tuju. Satu bahan salutan mempunyai daya pemantulan 0.15 dan pekali serapan (a) 100 cm!. Rekabentuk satu lapisan salutan perisai yang akan merrbenarkan hanya 0.5% sinaran kejadian dihantar melalui salutan tersebut.]
(c) In a lab, a protecting layer is needed on a casing of a device to shield the incident radiation. A coating material has a reflectivity of 0.15 and an absorption coefficient (a) of 100 cm!. Design a shield coating layer that will permit only 0.5% of the incident radiation to be transmitted through the coating. [Dalam makmal, satu lapisan pelindung diperlukan pada selongsong peranti untuk melindungi sinaran tuju. Satu bahan salutan mempunyai daya pemantulan 0.15 dan pekali serapan (a) 100 cm!. Rekabentuk satu lapisan salutan perisai yang akan merrbenarkan hanya 0.5% sinaran kejadian dihantar melalui salutan tersebut.]
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