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Which ray represents red color and which ray represents violet color
.........
Scientist proved that the energy of light waves is composed of photon
Max plank
Prove that light travels in straight line
..............
Lest the seven spuctiriam colors
Red, orange, yellow, green, blue, Indigo, violet
Differentiate between ( transparent, translucent, opaque)
.......,.,.,.,.,.,.,
G.R : the energy of red light photon is less than that of orange light photon
Because the frequency of red light photon is less than that of orange light photon
What is meant by : speed light
It is the distance covered by light in one sec.
G.R : the intensity of sound increase when the sound source toches a resonance box
Due to the increase in vibrating surface area
What is meant by sound pitch
It is the property which the ears can differentiate between harsh and sharp voices
S.t : the characteristic by which the ear diffrentiate between  strong or weak sounds
Sound intensity
Complete : sound waves are........ Waves which travels through air as pulses of..........,..........
Mechanical, compassion, rarefaction
Complete : sound is produced due to......
The vibration of any body
Complete : humans ear can differentiate between sounds through different factors which are.........,............,...........,
Sound pitch, sound intensity, sound quality
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