3.2.2 Refraction of light

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Question 45

A student investigates the refraction of a ray of light passing through a rectangular transparent block.

The student draws a line perpendicular to the surface of the block at the point of entry $E$ of the ray. State the term used for this perpendicular line.

[1]

Using the ray-trace sheet, the student measures the following quantities:

Length of the ray path inside the block, $8.0\text{ cm}$
Perpendicular distance between the incident ray's alignment and the emergent ray, $2.3\text{ cm}$
Horizontal distance along the bottom surface from the perpendicular line to the point where the ray exits the block, $3.8\text{ cm}$

Calculate the value of $dl\frac{d}{l}$ .

[2]

Given that the angle of incidence is $θ=45∘\theta = 45^\circ$ , the refractive index $n$ of the block can be calculated using the equation:

\times \frac{l}{L}

Calculate the refractive index $n$ of the block, giving your answer to 2 decimal places.

[2]

Suggest how the student can adapt this experiment to check if the value of $dl\frac{d}{l}$ is reproducible.

[1]

State one practical source of inaccuracy in this ray-tracing experiment, even if it is carried out very carefully.

[1]

3.2.2 Refraction of light

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

Question 45

A student investigates the refraction of a ray of light passing through a rectangular transparent block.

The student draws a line perpendicular to the surface of the block at the point of entry $E$ of the ray. State the term used for this perpendicular line.

[1]

Using the ray-trace sheet, the student measures the following quantities:

Length of the ray path inside the block, $8.0\text{ cm}$
Perpendicular distance between the incident ray's alignment and the emergent ray, $2.3\text{ cm}$
Horizontal distance along the bottom surface from the perpendicular line to the point where the ray exits the block, $3.8\text{ cm}$

Calculate the value of $dl\frac{d}{l}$ .

[2]

Given that the angle of incidence is $θ=45∘\theta = 45^\circ$ , the refractive index $n$ of the block can be calculated using the equation:

\times \frac{l}{L}

Calculate the refractive index $n$ of the block, giving your answer to 2 decimal places.

[2]

Suggest how the student can adapt this experiment to check if the value of $dl\frac{d}{l}$ is reproducible.

[1]

State one practical source of inaccuracy in this ray-tracing experiment, even if it is carried out very carefully.

[1]

3.2.2 Refraction of light

Question 45

Markscheme

3.2.2 Refraction of light

Question 45

Markscheme

3.2.2 Refraction of light

Question 45

3.2.2 Refraction of light Questions

3.2.2 Refraction of light

Question 45

3.2.2 Refraction of light Questions