Gamma rays are considered the death rays.
Gamma rays travel with the velocity of light
Gamma rays have maximum penetrating power
Shortest wavelength among alpha, beta and gamma is of gamma rays
Laser rays are used in micro surgery
Alpha radiations produce burns on human body
Newton proved that sunlight consists of different colors
Beta rays are fast moving electrons.
Color with shortest wavelength is Blue
Violet have shortest wave length and Red has longest wavelength (vibgyor)
Red light’s wave length is 11800 waves/cm (< infra red)
Least deviated color in prism is red
Greatest deviated color in prism is indigo (chk violet)
Violet light’s wave length is 23600 waves/cm (> ultra violet)
Ultraviolet rays are less than 3000 deg: A
Greatest value of wavelength is of infra red
Visible waves are between 400-700 nanometers.
MOTE = Million Tons of oil equivalent
REM = Roentgen equivalent in man
Transverse waves can only be produced in solids
Longitudinal waves can be produced in solids, liquids and gases
On passing thought food stuff, x-ray can kill bacteria
Violet color of light t ravel thought glass with minimum speed
There is no wavelength of light for color brown.
White light is a mixture of all the colors in the rainbow.
Blue has the shortest wavelength and red the longest.
Radio waves also come from sun and outer space. Astronomers use radio telescope to hear them.
Radar uses microwaves.
Anything that is warm produces infrared waves including us. The hotter the thing the more IR.
Infrared waves are used in TV remote control.
X-rays have shorter wavelength and more energy than ultraviolet rays.
Gamma rays come from radioactive materials. They are used to kill cancers.
Without exposure to ultraviolet light our bodies would not be able to make vitamin D.
UHF, ultra high frequency are radio waves used for TV broadcast
Microwaves are used in radar, mobile phones, microwave oven, communication network
Each light color is of different wavelength.
Red light has the longest wavelength while violet light has the shortest.
Waves with a longer wavelength than red light are invisible they are called infrared waves.
Invisible Ultraviolet wave have wavelength shorter than violet light.
Red, Blue, Green are prime colors.
Red + Blue + Green = white
The wavelength of visible light is between 1350-2500
An object that reflects all the light looks white.
Loud speaker converts electrical energy into sound energy.
Light coloured clothes are generally worn in summer
The electrical device which transform voltage : transformer
A nuclear reaction in which two or more than two lighter nuclear are fused together to form a relatively heavier one : nuclear fusion
The three colours combination which produces the sensation of white light : Red green and blue
The clear sky looks blue because of dispersion of light
When light waves travel from air to glass the wavelength and velocity variables are affected.
Electrical lines of forces are imaginary.
Frequency distinguishes ultrasound from normal audible sound. Its f > 20,000 Hz.
No comments:
Post a Comment