A plane glass sheet is kept over various coloured pictures. The least raised picture is:

Question

Smart Achievers · Accepted Answer

(4)

$μ = \frac{Real thickness (x)}{Apparent thickness (y)} \Rightarrow y = \frac{x}{μ},$ $\frac{y_{v}}{y_{R}} = \frac{x}{μ_{v}} \times \frac{μ_{R}}{x} = \frac{μ_{R}}{μ_{v}}$

$Since μ_{v} > μ_{R}$ $∴$ $y_{R} > y_{v}$

$Red colour has maximum apparent thickness. Hence red colour is least raised.$

Solution

Q.
A plane glass sheet is kept over various coloured pictures. The least raised picture is:

1 Green

2 Yellow

3 Violet

4 Red

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