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.

False (B) Signup and view all the answers

What is the heat of fusion?

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

What is thermal diffusivity?

The rate at which a body with a non-uniform temperature approaches equilibrium. 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 (______).

α Signup and view all the answers

What is the definition of light?

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

Which of the following describes refraction?

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

Fluorescence and phosphorescence are the same phenomenon.

False (B) Signup and view all the answers

Which parameters can the eye distinguish differences in color?

All of the above (D) Signup and view all the answers

Match the types of optical interaction with their definitions:

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 Signup and view all the answers