299,792,458 m/s in vacuum, somewhat less in any material medium, different in every medium.
Visible light or electromagnetic radiation within 400nm to 700nm is responsible for colour of the spectrum.
Explanation:
The electromagnetic spectrum contains radiations of varying wavelength. The radiations with the lowest energy are characterised by the longest wavelength.
Within this spectrum lies the visible light which enables us to see a different colour. The radiations within the range 400nm to 700nm are included in the visible spectrum.
While violet lies at the 400nm spectrum part red colour lies at 700nm part. As the wavelength of the radiation transverses between 400-700 nm, the colour of the object changes accordingly.
gaining thermal energy in form of heat
Explanation:
When the thermal energy of a matter is increasing, it will directly increase the kinetic energy of the matter.
- Temperature changes causes the average kinetic energy of molecules to increase or decrease.
- If the kinetic energies of particles are increasing, the temperature must have been on rise.
- Increase in temperature causes molecules to start vibrating and moving about.
- The gain more energy that helps them to move away from their original position
Learn more:
Kinetic energy brainly.com/question/7966903
#learnwithBrainly
Answer:
Workdone =0
Explanation:
The body is inclined at θ=30°, s=10m, m=5kg
Workdone by the object = FsCosθ
but the surface is a friction-less surface, this means coefficient of friction =0
F=μR
F=0*R
F=0
W=FScosθ
W=0*SCosθ
W=0
Answer:
Explanation:
distance between two crests = 8 m
The distance between the two crests is called wavelength.
So, wavelength, λ = 8 m
frequency = 2 Hz
Let v be the velocity of wave.
v = f x λ
v = 2 x 8
v = 16 m/s
