This infrared image shows a hand pointing to a switch on a power board. The colours represent the amount of infrared radiation being emitted, as shown by the scale on the right hand side.Identify which statement is true. The hand is emitting the least radiationThe hottest part of the image is the background, shown in dark blueThe switch at point D is emitting the most radiationThe plug at point B is emitting the least radiation

The diagram above shows how infrared radiation relates to the visible spectrum. Select the two options that best complete the following sentence.Compared to red light, infrared radiation has:higher amplitudeshigher frequencieslonger wavelengthslower frequenciesI'm not sure

The student wrote the hypothesis:‘Surface colour of the flask affects the amount of infraredabsorbed when the heater is switched on for five minutes.’Describe how the equipment in Figure 2 could be used to test this hypothesis

Inferring from the infrared image, the temperature of the top of the radiator is approximately:

Which of the following does NOT occur when the temperature of a red-hot object increases?The amount of electromagnetic radiation which it emits increases at all wavelengthsIt emits more visible lightThe potential energy of the particles which make up the object decreasesThe shortest wavelength of the radiation which it emits decreases2The radiation produced by an infrared laser has a wavelength of 1054 nm.  Convert this wavelength to metres.1.054 × 10-9 m1.054 × 10-3 m1.054 × 10-12 m1.054 × 10-6 m3What happens to an object when it emits energy faster than it absorbs energy?Its temperature decreasesIts temperature remains constantIts temperature increasesIt is impossible to say what happens to the temperature of the object without knowing the specific heat capacity of the material from which it is made4Which of the following statements is incorrect?The intensity of the radiation which we receive from the Sun can be measured in joules per square metreThe intensity of the radiation which we receive from the Sun can be measured in watts per square metreThe intensity of the radiation which we receive from the Sun can be measured in joules per second per square metreThe intensity of the radiation which we receive from the Sun is higher at the Equator than it is at the poles5Which of the following statements is incorrect?Some of the radiation from the Sun which reaches the Earth is reflected by clouds and atmospheric gasesAll of the infrared radiation from the Sun which reaches the surface of the Earth is absorbedIf the overall rate at which energy from the Sun is absorbed by the Earth is greater than the overall rate at which energy is emitted into space, the temperature of the Earth will increaseIf the overall rate at which energy from the Sun is absorbed by the Earth is less than the overall rate at which energy is emitted into space, the temperature of the Earth will decrease

A light emitting diode produces light of wavelength 850 nm. When you turn it on and look at it you see:Select one:a.Nothing as 850 nm is ultraviolet (UV) radiation.b.Green Light c.Blue Light d.Nothing as 850 nm is infrared (IR) radiation.e.Red Light