The frequency of infrared radiation detected from an object is 8 × 1012 Hz.  What is the temperature of the object?  (Note:  For the speed of light, use 3 × 108 m/s.)A.80 °CB.50 °CC.30 °CD.10 °

The human eye is most sensitive to 560 nm (green) light. What is the temperature (K) of a black body that would radiate most intensely at this wavelength?

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

An astronomer's infrared telescope is able to detect radiation with a wavelength of 0.00000957 meters. Write this number in scientific notation.

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

The range of human hearing extends from approximately 20 Hz to 20,000 Hz. Find the wavelengths of these extremes at a temperature of 12.0°C.20 Hz     m20,000 Hz     m