Fusion is joining two things together while Fission is Dividing two things into pieces
Answer:
No ejection of photo electron takes place.
Explanation:
When a photon of suitable energy falls on cathode, then the photoelectrons is emitted from the cathode. This phenomenon is called photo electric effect.
The minimum energy required to just eject an electron is called work function.
The photo electric equation is
E = W + KE
where, E is the incident energy, W is the work function and KE is the kinetic energy.
W = h f
where. h is the Plank's constant and f is the threshold frequency.
Now, when the violet light is falling, no electrons is ejected. When the red light is falling, whose frequency is less than the violet light, then again no photo electron is ejected from the metal surface.
Assuming both billiard balls have the same mass, conservation of momentum says
where m = mass of both billiard balls, and v₁ and v₂ = their initial velocities, and v₁' and v₂' = their final velocities. The masses are the same so the exact value of m is irrelevant. The first ball has initial speed 5 m/s and the second is at rest, so
After the collision, the first ball has speed 4.35 m/s and is moving at angle of 30° below the original path, so
Then the second ball has final velocity vector
so it moves with speed
at an angle of
or about 60.5° above the original line of motion.
Answer:
Explanation:
The factor by which the shutter speed is increased is
Exposure time will be increased by
The proper shutter speed is given by
The proper shutter speed is