Presence of _______- in retina gives us night vision that is help us to see in dim light.Required to answer. Single choice. Imme
1 answer:
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Given :
The light rays in the incident ray originate at 20º from the surface.
To Find :
The angle for the incident ray.
Solution :
We know angle of incidence is measured from perpendicular to the surface .
So,
Now, we know by law of reflection :
Angle of reflection = Angle of incident
Therefore, the angle of incident and reflection is 70° each.
Answer:
31.005 KJ
Explanation:
We are given that
Mass of hammerhead=25 kg
Initial velocity,u=0
Final velocity,v=50 m/s
h=-1 m
h'=0
We have to find the change in total energy of the hammerhead.
Change in total energy=
Using the formula
Change in internal energy of hammerhead=
Change in total energy=
Where
Change in total energy=
1 KJ=1000 J