An IGCSE physics class is investigating the position of the image in a plane mirror using pin-tracing. A student marks the position of an object pin at $P_1$ . By tracing two different reflected rays and extending their paths behind the mirror line, the student finds that the construction lines intersect at point $Y$ , which represents the position of the virtual image.

The student's measurements are as follows:

Perpendicular distance from the object pin $P_1$ to the mirror line: $58\text{ mm}$
Perpendicular distance from the image point $Y$ to the mirror line: $61\text{ mm}$

State whether the student's results support the suggestion that the object distance $a$ is equal to the image distance $b$ . Justify your statement by referring to the values.

Suggest two practical precautions that should be taken when positioning the pins on the ray-trace sheet to ensure the results are as reliable and accurate as possible.

The student's measurements are as follows:

Perpendicular distance from the object pin $P_1$ to the mirror line: $58\text{ mm}$
Perpendicular distance from the image point $Y$ to the mirror line: $61\text{ mm}$

State whether the student's results support the suggestion that the object distance $a$ is equal to the image distance $b$ . Justify your statement by referring to the values.

Suggest two practical precautions that should be taken when positioning the pins on the ray-trace sheet to ensure the results are as reliable and accurate as possible.

3.2.1a Reflection of light

Question 10

Markscheme

3.2.1a Reflection of light

Question 10

Markscheme

3.2.1a Reflection of light

Question 10

3.2.1a Reflection of light Questions

3.2.1a Reflection of light

Question 10

3.2.1a Reflection of light Questions