A ray of light incident in water strikes the surface separating water from air making an angle of 10 ° with the normal to the surface. (refractive index of water = 1.3) a) What is the angle of refraction? b) What should be the angle of incidence if we want an angle of refraction not greater than 45 ° ? c) What is the critical angle?
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Ответ:
a
b
c
Explanation:
From the question we are told that
The angle of incidence is![\theta_1 = 10^o](/tpl/images/0964/9773/863d6.png)
The refractive index of water is![n_1 = 1.3](/tpl/images/0964/9773/a7d55.png)
Generally Snell's law is mathematically represented as
Here
is the refractive index of air with value ![n_2 = 1](/tpl/images/0964/9773/40336.png)
So
=>![\theta _2 = sin^{-1}[\frac{1.3 * sin(10)}{1} ]](/tpl/images/0964/9773/33899.png)
=>![\theta _2 = 13^o](/tpl/images/0964/9773/c5ce1.png)
Given that the angle should not be greater than
then the angle of incidence will be
=>![\theta _1 = sin^{-1}[\frac{1 * sin(45)}{1.3} ]](/tpl/images/0964/9773/9320d.png)
=>![\theta _1 =32.94^o](/tpl/images/0964/9773/ac90b.png)
Generally for critical angle is mathematically represented as
=>
=>
Ответ:
Explanation :
Takumi wears sunscreen and a hat each time he works in the yard. This is to protect himself with the strong radiation coming from the sun. UV rays that are coming from the sun are the main cause of skin cancer.
Stochastic effects are the effects that are caused by chance. Cancer is one of the main stochastic effects.
So, the correct option is (b) "the severity of stochastic effects, such as cancer".