A student traces the path of a ray of white light through a rectangular glass slab and marks the angles of incidence (∠i), refraction (∠r) and emergence (e) as shown. Which angle or angles have not been marked correctly?

∠i only

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∠i and ∠e

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∠r and ∠E

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∠i and ∠r

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Solution

The correct option is B
∠i and ∠e

∠i and ∠e are not marked correctly. Each angle is supposed to be marked from the normal.

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A student traces the path of a ray of white light through a rectangular glass slab and marks the angles of incidence (∠i), refraction (∠r) and emergence (e) as shown. Which angle or angles have not been marked correctly?

The correct option is B ∠i and ∠e ∠i and ∠e are not marked correctly. Each angle is supposed to be marked from the normal.

The correct option is B
∠i and ∠e

∠i and ∠e are not marked correctly. Each angle is supposed to be marked from the normal.