If an electron enters into a space between the plates of a parallel plate capacitor at an angle α with the plates and leaves at an angle β to the plates. The ratio of its kinetic energy while entering the capacitor to that while leaving will be

Question

If an electron enters into a space between the plates of a parallel plate capacitor at an angle α with the plates and leaves at an angle β to the plates. The ratio of its kinetic energy while entering the capacitor to that while leaving will be, sin ⁡ β sin ⁡ α 2, cos ⁡ β cos ⁡ α 2, cos ⁡ α cos ⁡ β 2, sin ⁡ α sin ⁡ β 2

MARKS App · Accepted Answer

In the direction parallel to plate v 1 cos ⁡ α = v 2 cos ⁡ β v 1 v 2 = cos ⁡ β cos ⁡ α ratio of kinetic energy KE 1 KE 2 = v 1 v 2 2 KE 1 KE 2 = cos ⁡ β cos ⁡ α 2

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