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Q.

When cathode rays strike zinc sulfide coating, what did it create?

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a

Blue light

b

UV rays

c

White light 

d

Bright spot

answer is A.

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Detailed Solution

Zinc sulfide is a phosphorescent material, which has been coated on the anode. when cathode rays strike on the anode, electrons hit on the Zinc sulfide screen, hence creating a bright spot.

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When cathode rays strike zinc sulfide coating, what did it create?