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In a parabola spectrograph, the velociti...

In a parabola spectrograph, the velocities of four positive ions P,Q,R and S are `v_1, v_2, v_3 and v_4` respectively . Then

A

`v_1 gt v_2 gt v_3 gt v_4`

B

`v_1 lt v_2 lt v_3 lt v_4`

C

`v_1 = v_2 = v_3 = v_4`

D

`v_1 lt lt v_2 gt v_3 lt v_4`

Text Solution

Verified by Experts

The correct Answer is:
A
Deflection `prop 1/v^2`
As `x_P lt x_Q lt x_R lt x_S`
Hence `v_1 gt v_2 gt v_3 gt v_4`
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