Thermal Properties of Matter Flashcards
Internal Energy
The internal energy of a substance is the total energy of all the particles in the substance.
Heat capacity
Heat capacity is the amount of thermal energy needed to raise the temperature of a substance by 1°C
Specific heat capacity
Specific heat capacity is the amount of thermal energy required to raise the temperature of a unit mass of a substance by 1°C
Latent heat
Latent heat is the energy released or absorbed by a substance during a change of state, without a change in its temperature
Specific latent heat of fusion
Specific latent heat of fusion of a substance is the amount of thermal energy required to change a unit mass of the substance from solid to liquid state, without a change in temperature
Specific latent heat of vaporisation
Specific latent heat of a substance is the amount of thermal energy required to change a unit mass of the substance from liquid to gaseous state, without a change in its temperature
The first law of reflection
The first law of reflection states that the incident ray, reflected ray and the normal at the point of incidence all lie in the same plane.
Second law of reflection
The second law of reflection stated that the angle of incidence is equal to the angle of reflection
Characteristics of a plane mirror image
- The image is of the same size as the object
- It is laterally inverted
- It is upright
- It is virtual
- It’s distance from the mirror is equal to the distance of the object from the mirror
Laterally inverted image
An image whose left-hand side is the right hand side of an object and vice versa
Virtual image
An image that cannot be captured on a screen and light rays do not meet at the image position
Real image
An image that can be captured on a screen and light rays meet at the image position
Refraction
Refraction is the bending of light as lights passes through one optical medium to another
