Formular de verificare
Raspunsuri la: Teste optica
1. c, d, f, g, l, o, p.
2. a; 3.c(vezi figura 2.a)
4 d. (l) = n
1·d
1 = n
2·d
2 = n
3·d
3,
n
1 < n
3 < n
2,
n
1/n
2 = d
2/d
1, → d
2 < d
1,
n
2/n
3 = d
3/d
2, → d
3 > d
2,
n
1/n
3 = d
3/d
1, → d
3 < d
1,
d
1 > d
3 > d
2.
5. c
(ca in figura 5.c. de mai sus)
6. b. 1/f = (n - 1)(1/R
1 - 1/R
2), 1/f ' = (n
s/n - 1)(1/R
1 - 1/R
2),
(1/f)/(1/f ') = (n - 1)/(n
s/n - 1), → n
s = (f ' - f)/(f '/n - f).
7. c (fig 7.c.);
8. c. sin i/sin r = n
2/n
1 = √3, sin r = sin i/√3,
sin r = 1/2,→ r = 30
o, 180
o -(i + r) = 90
o
9. d. 1/f ' = (n
lentila/n
lichid - 1 )(1/R
1 - 1/R
2),
daca n
lentila = n
lichid, atunci
(n
lentila/n
lichid = 1,→ 1/f ' = 0, iar f ' → ∞
10. b. (vezi figura 10)
11. b.
12. a. ε = h·ν = h·c/λ
ε = 3·10
-19J.
13. a.(fig.13)
14. d. Din fig 14: tgα = y
1/x
1 = y
2/x
2,
y
1·x
2 = y
2·x
1,→ y
1 > y
2.
15. b. 1/x
2 - 1/x
1 = 1/f,
x
2 = x
1 ·f/(f + x
1)
16. c.(fig 16) sin i/sin r = n/n
aer = n,→ n = √2 = 1.41.
17. d. Din fig.17 d = 4f, f = d/4, C = 1/f = 4/d = 5m
-1 = 5δ(dioptrii).
18. I. a. h·ν = m
e·v
2/2 + h·ν
o,
m
e·v
2/2 = e·U
s, ν c/λ,
h·c/λ
1 = e·U
s1 + h·c/λ
o,
h·c/λ
2 = e·U
s2 + h·c/λ
o,
h·c(1/λ
2 - 1/λ
1 ) = e·(U
s2 - U
s1)
h = e·(U
s2 - U
s1)·λ
1·λ
2/c·(λ
1 - λ
2),
h = 6.6386·10
-34J·s ≈ 6.64J·s;
II. b. h·c/λ
1 = e·U
s1 + h·c/λ
o,
λ
o = 1/(1/λ
1 - e·U
s1/h·c),
λ
o = 3.26·10
-7m
III. c.
IV. c
h·c/λ
1 = e·U
s1 + E
o,
h·c/λ
2 = e·U
s2 + E
o,
E
o = e·(λ
2·U
s2 - λ
1·U
s1)/(λ
1 - λ
2)
E
o = 5.347·10
-19J = 3.34eV
1eV = 1,6·10
-19J
5.347·10
-19J = 3.34eV
Solutii unitati de masura
1. d; 2. d; 3. b; 4. a; 5.a; 6.b; 7.c; 8.c; 9.d; 10.d; 11.a; 12.a; 13.d; 14.a; 15.b; 16.a.