05-01-2018, 04:31 PM
IC Chip
*IC is an electronic circuit on semiconductor chip.
*IC is made of germanium or silicon.
*IC chips using Germanium was invented by
Ans : Jack Kilby
*IC chip using silicon was invented by
Ans : Robert Noyce
LIGHT
*Study of light - Optics
*Speed of light - 3 X 108 m/s
*Time taken by Sun light to reach earth
Ans : 8 minute 20 seconds (500 Seconds)
*Time taken by moonlight to reach earth
Ans : 1.3 seconds
*Light travels fastest in
Ans : Vacuum
*The medium in which density of light isminimum
Ans : Vacuum
*What tefpens to velocity of light asit travels from , a denser medium to rarer medium
Ans : Increases
*Light is a transverse wave.
*Unit of wavelength of light
Ans : Angstrom
*Speed of Light Was first measured by
Ans : Ole Christian Romer
*The medium in which the speed of light is least
Ans : Diamond
*The medium in which density of light is maximum
Ans : Diamond
*Particle which travels faster than light-
Ans : Tachyons
*Tachyons were discovered by-
Ans : ECGSudarsan
*The Scientist who proved that light is an electro magnetic wave
Ans : Henrich Hertz
*Order of speed of light in different medium is - glass < water < air < vacuum
*Substance which do not pass light through them are called
Ans : Opaque substances
eg:- Cardboard, stone
*Substance which allow light to pass through them
Ans : Transparent substances
eg:- glass
*Substance which allow a part of incident light to pass through them - Translucent substances
eg:- oil paper
*Rainbow is always formed in the opposite direction of sun
*The direction in which the rainbow is formed in morning
Ans : West
Light Year
*The distance travelled by light in one year
Ans : Light Year
*Unit used to measure the largest distance between stars
Ans : Light Year
*L light year
Ans : 9.46*10^12Km
*I Parsec
Ans : 3.26 light year
*The distance from sun to the nearest star
Ans : 4 1/2 light year
