السؤال رقم 4
An aquarium contains a 5-cm layer of water (n = 1.33) floating on top of carbon tetrachloride (n = 1.461). If the angle of incidence into the water from the air is 30°, what is the angle of refraction into the carbon tetrachloride?
المسأله هنا بيكون حلها
From (air) to (water)
From (water) to carbon
وزاويه الانكسار2 هي نفسها بتكون زاويه سقوط عندا تصل للكربون
وضحتها لك بالصوره
n1 = 1.00 للهواء
n2 =1.33 للماء
n3 = 1.461 للكربون
Ө1= 30
n1 sin Ө1 = n2 sinӨ2
ملاحظه sin-1 هي ساين اوس سالب واحد
(Ө2= sin-1( n1sinӨ1 / n2
(sin-1 (1.00 sin 30 / 1.33 =
)sin-1 (1.00 x0.5 /1.33=
(sin -1 (0.5 /1.33=
(sin-1 (0.3759=
Ө2 =22
Ө2=Ө3
n2sinӨ3 =n3sinӨ4
(Ө4 = sin-1 (n2sinӨ3 /n3
(sin-1 (1.33 sin22 /1.461=
(sin-1 (1.33x0.3746/1.461=
(sin-1 (0.498/1.461=
( sin-1 (0.34086=
19.9=
بالتقريب تعطي
20
مواقع النشر (المفضلة)