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Sergeu [11.5K]
2 years ago
13

A light ray is incident on a smooth surface at an angle of 25 degrees with the surface. What is the angle of incidence?

Physics
1 answer:
kompoz [17]2 years ago
6 0

The angle will have 45 degree ments

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Answer:

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Explanation:

Given;

resistivity of the wire, ρ = 0.12 ohms per meter

(a) The resistance of 25m of wire is calculated as follows;

R = \rho L\\\\R = 0.12 \ \frac{ohms}{m} \times 25\ m\\\\R = 3 \ ohms

(b) the length of this wire that has resistance 22 ohms is calculated as;

L = \frac{R}{\rho} \\\\L = \frac{22 \ ohms }{0.12 \ ohms/m} = 183.33 \ m

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