Great question. Albert Einstein proved that light acts as both a particle and a wave in his 1905 paper. This is called wave-particle duality.
With quantum mechanics, it is easy to prove that light behaves as both a particle and a wave.
When UV light hits a metal surface, it causes an emission of electrons. This "photoelectric effect" proves how light behaves.
Answer:
in first case the torque is maximum.
Explanation:
Torque is defined as the product of force and the perpendicular distance.
τ = F x d x Sinθ
In case A: the angle between force vector and the distance vector is 90 so torque is
τ = F x d
In case B: the angle between force vector and the distance is 30°.
τ = F x d x Sin30
τ = 0.5 Fd
So the torque is maximum in first case.
Answer:
1992
Explanation:
Badminton made its debut as a demonstration sport at the 1972 Olympic Games in Munich. It was not until the 1992 Games in Barcelona that it was officially included on the Olympic programme, with men's and women's singles and doubles events.
Do cherry popsicles freeze slower than orange popsicles
Answer:
Part a)
Part b)
Part c)
Explanation:
Part a)
As we know that ball will reach at maximum height at
t = 3 s
now we will have
now we have
Now maximum height above ground is given as
Part b)
Height of the fence is given as
Part c)
As we know that its horizontal distance moved by the ball in 5.5 s is given as
now total time of flight is given as
so range is given as
so the distance from the fence is given as
