# Doubt from Refraction

x=3Rtan(\delta)

\delta= angle of deviation due tofirst refraction Is it B

I didn't understand your hints properly can you explain

What's the answer now I'm getting A

Yeah, answer is A

\theta should be 2 \delta ,right?

I have taken the ratio of sides

2tan{\delta}= tan\theta

Then ans is coming different

Show me your calculation

Also if \delta very small

tan(2\delta)\rightarrow 2tan{\delta}

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Okay, thanks I made a mistake in calculating

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