Download Grade 10 Academic Science – Optics (Physics) Laboratory

Grade 10 Academic Science – Optics (Physics)
Laboratory - Locating Images in a Plane Mirror
Science Perspectives 10 Section 11.8 Pages 494-495
Testable Question - What are the characteristics of the image in a plane mirror?
Hypothesis
 The image in a plane mirror can be predicted using SALT (size, altitude, location and type)
Materials
 Ray box and slit
 Plane mirror and mirror supports
 Pencil and ruler
 Protractor
 Sheet of white paper
Methods
1. Draw a horizontal line using the pencil and ruler across the centre of the sheet of paper
2. Mount the plane mirror on the line. NOTE: The back edge of the mirror should be on the line.
3. Using the pencil, draw an arrow on the paper IN FRONT of the mirror. The arrow should be at an
angle to the mirror.
4. Draw a small circle over the arrowhead and label it O1
5. Draw a small circle over the tail of the line and label it O2
6. Use the ray box with the single opening of the slit, direct a ray of light through O1.
7. Mark at least three points on the Incident Ray and three points on the Reflected Ray
8. Use the ruler, connect the points and draw both the Incident Ray and Reflected Ray
9. Send a second ray of light through the arrowhead at O1 BUT in a different direction
10. Repeat Steps #10-11
11. Repeat Steps #6-10 through the line’s tail at O2
12. Remove the mirror
13. Use the dashed lines, extend the two REFLECTED RAYS from O1 back behind the mirror to
where the lines intersect.
14. Label the point where they intersect as I1
15. Repeat Steps #13-14 for the two REFLECTED RAYS from O2 and label the point of intersection
I2
16. Use the locations I1 and I2 to sketch the image behind the mirror using a dashed line (-------)
17. Draw a line from O1 to I1. Measure the length of the line from O1 to the mirror and I1 to the
mirror.
18. Measure the angle that these lines make with the mirror.
19. Record your measurements in Table 1.
20. Repeat Steps #17-19 for a line from O2 to I2 and record your measurements in Table 1.
Table 1. Measurements of an Image in a Plane Mirror
Arrowhead
Length
Object to Mirror
Image to Mirror
Angle
Object to Mirror
Image to Mirror
Questions
 Answer Questions a-g on Page 495
Line Tail