3.2.2 Refraction of light

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Question 15

A student performs a ray-tracing experiment to determine the refractive index of a transparent rectangular block.

The student draws a normal at the centre of side $A B$ of the block, meeting the side at point $E$ . Point $N$ is marked on the normal outside the block such that $5.0\text{ cm}$ . A straight line $N F$ representing the incident ray is drawn to the block at an angle of $25∘25^\circ$ to the normal, where $F$ lies on $A B$ .

Calculate the length $a$ of the line $N F$ . Give your answer to 2 significant figures.

[2]

In the experiment, the student traces the ray through the block and out the other side. By extending the refracted ray, they find it meets the normal at point $H$ inside the block. The measured length $b$ of the line $F H$ is $cm7.6\text{ cm}$ . Calculate the refractive index $n$ of the block using the formula:

\frac{b}{a}

Give your answer to 2 significant figures.

[2]

Suggest two precautions that should be taken in this pin-tracing experiment to obtain readings that are as accurate as possible.

[2]

A student performs a ray-tracing experiment to determine the refractive index of a transparent rectangular block.

Calculate the length $a$ of the line $N F$ . Give your answer to 2 significant figures.

\frac{b}{a}

Give your answer to 2 significant figures.

[2]

Suggest two precautions that should be taken in this pin-tracing experiment to obtain readings that are as accurate as possible.

[2]

3.2.2 Refraction of light

Question 15

Markscheme

3.2.2 Refraction of light

Question 15

Markscheme

3.2.2 Refraction of light

Question 15

3.2.2 Refraction of light Questions

3.2.2 Refraction of light

Question 15

3.2.2 Refraction of light Questions