പ്രധാനപ്പെട്ട വേവ്സ്, റെയ്സ്, റഡാർ, എന്നിവ കൂടാതെ താപവുമായി ബന്ധപ്പെട്ട ചോദ്യങ്ങളുമാണ് ഇന്നത്തെ പാഠത്തിൽ ഉൾപ്പെടുത്തിയിരിക്കുന്നത്.
- Waves used in point to point fixed telecommunication
Microwaves
- Waves used in Radio and Television communication
Radio waves
- Electromagnetic waves having lowest frequency
Radio waves
- Rays which cause sunburn
Ultraviolet Rays
- LASER stands for
Light Amplification by Stimulated Emission of Radiation
- LASER was discovered by
Theodore Maiman
- Rays used in Medical field for performing minute operations
LASER
- MASER stands for
Microwave Amplification by Stimulated Emission of Radiation
- MASER was discovered by
Charles H Towns
- RADAR stands for
Radio Detection and Ranging
- Device used to detect the position of objects like Aeroplanes, missile etc using Radio Waves
RADAR
- RADAR was detected by
Albert H Taylor and Leo C Young
- Father of long distance Radio transmission
Marconi
- Intensity of sound of Thunderstorm
110 db
- Intensity of sound of Jet Takeoff
130 db
- A disturbance which propagates energy from one place to another without transport of matter
Wave
- Propagation of disturbance at one place by vibration of particles to all other parts
Wave Motion
- A wave in which particles of medium vibrate in perpendicular to the direction of propagation of wave
Transverse wave
- A wave in which particles of medium vibrate in parallel to the direction of propagation of wave
Longitudinal wave
- The distance between two consecutive particles which are at the same phase of vibration
Wavelength
- No of vibrations in one second
Frequency
- Maximum displacement of a particle from its mean position
Amplitude
- Waves traveling through layers of earth due to Earthquakes, big explosions, volcanic explosions
Seismic Waves
- Scientists dealing with the study of seismic waves
Seismologist
- Transfer of Kinetic Energy from one medium or energy source to another medium is
Heat
- The study of materials and Phenomena at low temperature
Cryogenics
- Form of energy that gives us the sensation of hotness or coldness
Heat
- The degree of hotness or coldness of a body is defined as
Temperature
- Unit other than Joule using to measure Heat
Calorie
- One calorie
4.2 Joules
- The amount of heat required to raise the temperature of 1 gm of water by 1 degree C
One Calorie
- As we go up the atmosphere, the temperature
Decreases
- Color which absorbs more heat
Black
- Device used to detect heat radiation is called
Thermocouple
- The amount of heat required to raise the temperature of unit mass of a substance by 1°C
Specific Heat Capacity
- Substance having highest specific heat capacity
Water (4185 J/KgK)
- Specific heat of water is minimum at
37°C
- Element having highest specific heat capacity
Hydrogen
- Temperature above which a gas cannot be liquefied even in more power is called
Critical temperature
- Temperature at which Ice melts
0°C or 273K or 32°F
- Temperature at which water boils
100°C or 373K or 212°F
- Absolute zero is
-273.15°C or 0K
- Temperature which shows the same temperature in Fahrenheit scale and Celsius scale
-40
- Temperature which shows the same temperature in Fahrenheit scale and Kelvin scale
574.25
- Fraction of volume of ice seen outside when it is immersed in water
10.5%
- Various temperature scales are
Celsius (C), Kelvin (K), Fahrenheit (F), Rankine (Rn)
- Pressure of a gas is reduced to zero at
-273.15°C
- In Fahrenheit scale the interval between ice point and boiling point is divided into
180 equal parts
- To convert Celsius to Fahrenheit
F= (Cx9/5)+32
- To convert Fahrenheit into Celsius
C= (F-32)x5/9
- To convert Celsius to Kelvin scale
K= C+273.15
- To convert Kelvin to Celsius scale
C= K-273.15
(To be Continued…)