A student investigated how the type of surface of an object affects the amount of infrared radiation the object emits. The student used a sealed metal cube filled with hot water. Each vertical face of the cube had a different surface. Figure 1 shows the apparatus.

Figure: The apparatus used to investigate the infrared radiation emitted by four different surfaces

Write the independent variable in this investigation.

Give two variables that the student should control.

Table 1 shows the student's results.

Table: The reading on the infrared detector for each of the four surfaces of the cube

Surface	Detector reading in arbitrary units
Dull black	96
Dull white	70
Shiny black	62
Shiny silver	31

Use the data in Table 1 to write two conclusions about the surfaces that emit infrared radiation.

The dull black surface and the shiny black surface are the same colour. Suggest one reason why their detector readings are different.

Figure: The apparatus used to investigate the infrared radiation emitted by four different surfaces

Write the independent variable in this investigation.

Give two variables that the student should control.

Table 1 shows the student's results.

Table: The reading on the infrared detector for each of the four surfaces of the cube

Surface	Detector reading in arbitrary units
Dull black	96
Dull white	70
Shiny black	62
Shiny silver	31

Use the data in Table 1 to write two conclusions about the surfaces that emit infrared radiation.

The dull black surface and the shiny black surface are the same colour. Suggest one reason why their detector readings are different.

6.2 Electromagnetic waves

Question 4

Markscheme

6.2 Electromagnetic waves

Question 4

Markscheme

6.2 Electromagnetic waves

Question 4

6.2 Electromagnetic waves Questions

6.2 Electromagnetic waves

Question 4

6.2 Electromagnetic waves Questions