COPY: Physical Properties of Materials
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Questions and Answers

Which of the following are mass-related properties?

  • Melting Temperature
  • Thermal Conductivity
  • Density (correct)
  • Specific Gravity (correct)

What is density?

Mass per unit volume of a material.

What is specific gravity?

The ratio of the density of a material to the density of water at 4°C.

Thermal conductivity is the same as thermal diffusivity.

<p>False (B)</p> Signup and view all the answers

What is the heat of fusion?

<p>The amount of heat required to convert 1 gram of a material from solid to liquid at its melting temperature.</p> Signup and view all the answers

What is thermal diffusivity?

<p>The rate at which a body with a non-uniform temperature approaches equilibrium.</p> Signup and view all the answers

The change in length per unit length of the material for a 1°C change in temperature is called the linear coefficient of thermal expansion (______).

<p>α</p> Signup and view all the answers

What is the definition of light?

<p>Electromagnetic radiation that can be detected by the human eye.</p> Signup and view all the answers

Which of the following describes refraction?

<p>Change of direction of light on entering a second medium (B)</p> Signup and view all the answers

Fluorescence and phosphorescence are the same phenomenon.

<p>False (B)</p> Signup and view all the answers

Which parameters can the eye distinguish differences in color?

<p>All of the above (D)</p> Signup and view all the answers

Match the types of optical interaction with their definitions:

<p>Reflection = Light bouncing off a surface Refraction = Change of direction when entering a different medium Scattering = Redirection of light due to inclusions Transmission = Light passing through a medium without attenuation</p> Signup and view all the answers

What is metamerism in color matching?

<p>The change of color matching under different light sources.</p> Signup and view all the answers

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