Because specular reflection occurs with a mirror, while diffuse reflection occurs with aluminium or iron plate
Explanation:
Reflection is a phenomenon typical of waves (such as light wave), that occurs when a wave bounces off the surface of a certain material, going back into the original medium at a certain angle, without changing speed, frequency or wavelength.
The direction of the reflected ray is given by the law of reflection, which states that:
- The incoming ray, the reflected ray and the normal to the surface all lie on the same plane
- The angle of incidence is equal to the angle of reflection
Depending on the type of surface, two different types of reflection can occur:
- Specular reflection: this occurs when the surface is perfectly smooth. In such a case, all the incoming rays of light hit the surface with same angle of incidence, therefore they are reflected at the same angle. This means that a perfect and clear image of the original object can be formed: this is the case of a mirror.
- Diffuse reflection: when the surface is not smooth, the imperfections on the surface are such that the incoming rays of light hit the surface at different angles of incidence. As a result, the rays are reflected at different angles to each other, and therefore no clear image of the object is produced. This is the case of aluminium or iron plate.
Learn more about reflection and other wave phenomena:
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Don't be fooled ! The answer is a pair of scissor. I got it wrong because I put screw driver.
Answer:
a
The total charge is 
b
The change in potential energy is 
c
The height is 
Explanation:
From the question we are told that the
The magnitude of electric field is 
The number of proton is 
The distance between the plates is 
The total charge can be mathematically represented as
Where e is the charge on one proton which has a value of 
Substituting values
The change in potential energy is mathematically represented ads
where the negative sign shows that the work done by the electric force is against the electric field
Substituting values
The mass of the bead is given as 0.05kg
The change in potential due to gravity is mathematically given as
the negative sign is due to the fact that the height is decreasing
And 
Making h the subject
Substituting values
Answer:
evaporation, melting, freezing
Explanation:
matter is a solid, gas, or liquid
evaporation turns a liquid to gas
melting changes a solid to liquid
freezing changes a liquid to a solid
