Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
Infrared
16 practice questions
Practice questions
1–10 of 16
Question 1
1 mark · Easy
Answer and see the solution →State the relationship between an object's temperature and the amount of infrared radiation it emits.
Question 2
2 marks · Easy
Answer and see the solution →A person stands near an electric fire. Explain how the electric fire warms the person using infrared radiation.
Question 3
1 mark · Easy
Answer and check →Which statement about infrared radiation is correct?
- A.Infrared radiation can travel through a vacuum.
- B.Infrared radiation cannot travel through air.
- C.Infrared radiation is only present in sunlight.
- D.Infrared radiation is visible to the human eye.
Question 4
3 marks · Easy
Answer and see the solution →A loaf of bread is placed under a toaster grill. The grill heats up and glows red.
(a)[1 mark]Identify the type of electromagnetic radiation emitted by the hot grill.
(b)[2 marks]Explain how this radiation cooks the bread.
Question 5
1 mark · Easy
Answer and see the solution →State one way that infrared radiation can be harmful to the human body.
Question 6
2 marks · Easy
Answer and see the solution →Two identical beakers of water are placed at the same distance from an infrared lamp. Beaker 1 is covered with shiny foil, and Beaker 2 is covered with matte black paper. Both are left under the lamp for 5 minutes. Predict which beaker will be warmer at the end and explain why.
Question 7
2 marks · Easy
Answer and see the solution →A person checks their home for heat loss using an infrared camera. Explain why the camera is able to identify areas losing heat.
Question 8
1 mark · Easy
Answer and check →Which is a correct use of infrared radiation?
- A.Heating food in a grill
- B.Detecting gamma rays
- C.Transmitting X-rays for dental pictures
- D.Emitting blue light from an LED
Question 9
4 marks · Normal
Answer and see the solution →All objects emit infrared radiation. A hot stone is left to cool in a cold room.
(a)[2 marks]Explain why the stone emits more infrared radiation as its temperature increases.
(b)[2 marks]Name two household appliances or devices that use infrared radiation for their operation.
Question 10
2 marks · Normal
Answer and see the solution →State two uses of infrared radiation other than for heating.