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3 years ago

Plz answer the question

Physics

1 answer:

Vikentia [17]3 years ago

3 0

Answer:

Ray A = Incidence ray

Ray B = Reflected ray

Explanation:

From the law of reflection,

Normal: This is the line that makes an angle of 90° with the reflecting surface.

Ray A is the incidence ray: This is the ray that srikes the surface of a reflecting surface. The angle formed between the normal and the incidence ray is called the incidence angle

Ray B is the reflected ray: This is the ray leaves the surface of a reflecting surface. The angle formed between the reflected ray and the normal is called reflected angle

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Answer:

$6.75\mu C/m^2$

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We are given that

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Total charge= $q=ne=39\times 1.6\times 10^{-19}=62.4\times 10^{-19} C$

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Initial velocity,u=0

Final speed,v=4.5 m/s

$v^2-u^2=2as$

$(4.5)^2-0=2a(2\times 10^{-3})$

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Force,F=ma

$qE=ma$

$q(\frac{\sigma}{2\epsilon_0})=ma$

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$\epsilon_0=8.85\times 10^{-12}$

$\sigma=6.75\times 10^{-6}C/m^2=6.75\mu C/m^2$

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