While tracing the path of a ray of light passing through a rectangular glass slab a student tabulated his observations as given below:
$\begin{matrix} S . N O . & ∠ i & ∠ r & ∠ e I & 60^{\circ} & 39^{\circ} & 61^{\circ} I I & 50^{\circ} & 36^{\circ} & 51^{\circ} I I I & 40^{\circ} & 28^{\circ} & 39^{\circ} I V & 30^{\circ} & 20^{\circ} & 31^{\circ} \end{matrix}$

The correct observation is:

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III

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Solution

The correct option is D
IV

Using Snell's law, $\frac{s i n i}{s i n r} = \frac{n_{2}}{n_{1}}$ check the ratio of the sine values of I and r which gives 1.5 (we know, $n_{2} = 1.5$ and $n_{1} = 1)$ will be the answer.

The correct answer is D.

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Q. Four students perform an experiment on tracing the path of a ray of light passing through a rectangular glass slab. Their individual observations are:
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Q. After tracing the path of a ray of light passing through a rectangular glass slab for four different values of the angle of incidence, a student reported his observations in tabular form as given below :

S.No	<i	<r	< e
I	$30^{0}$	$19^{0}$	$29^{0}$
II	$40^{0}$	$28^{0}$	$40^{0}$
III	$50^{0}$	$36^{0}$	$50^{0}$
IV	$60^{0}$	$40^{0}$	$59^{0}$

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While tracing the path of a ray of light passing through a rectangular glass slab a student tabulated his observations as given below: S.NO.∠i∠r∠eI60∘39∘61∘II50∘36∘51∘III40∘28∘39∘IV30∘20∘31∘ The correct observation is:

The correct option is D IVUsing Snell's law, sin isin r=n2n1 check the ratio of the sine values of I and r which gives 1.5 (we know, n2=1.5 and n1=1) will be the answer. The correct answer is D.

The correct option is D
IV

Using Snell's law, $\frac{s i n i}{s i n r} = \frac{n_{2}}{n_{1}}$ check the ratio of the sine values of I and r which gives 1.5 (we know, $n_{2} = 1.5$ and $n_{1} = 1)$ will be the answer.

The correct answer is D.