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Physics 10 Chapter 3 - Geometrical Optics - 9
1.
How many law(s) of refraction are there?
a) Two
b) Three
c) Four
d) One
2.
According to laws of refraction, which of the following is true?
a) Incident ray = Refracted ray
b) Cosine of angle of incidence = Cosine of angle of refraction
c) Incident ray, normal and refracted ray all lie in same plane
d) Angle of incidence = Angle of refraction
3.
According to laws of refraction, which of the following is true?
a) Sine of angle of incidence = Sine of angle of refraction
b) Incident ray = Refracted ray
c) Incident ray, normal and refracted ray do not lie in same plane
d) Angle of incidence = Angle of refraction
4.
Which of the following quantity is not changed during refraction of light?
a) Its frequency
b) Its direction
c) Its speed
d) Its wavelength
5.
According to laws of refraction, which of the following formula is true?
a) Sin r / Sin i = Constant
b) Sin i + Sin r = Constant
c) Sin r x Sin i = Constant
d) Sin i / Sin r = Constant
6.
What is the ratio of sin of angle of incidence to the sin of angle of refraction called?
a) Angle index
b) Reflective index
c) Sine index
d) Refractive index
7.
What is the ratio “Sin i / Sin r” called?
a) Sine index
b) Angle index
c) Reflective index
d) Refractive index
8.
“Sin i / Sin r = n’ is called........................?
a) Snell’s law
b) Newton’s law
c) Pascal’s law
d) Archimedes law
9.
“n = n
2
/ n
1
” is called........................?
a) Pascal’s law
b) Snell’s law
c) Newton’s law
d) Archimedes law
10.
Which of the following formula is correct according to Snell’s law?
a) Formula: n = n
2
/ n
3
b) Formula: n = n
1
/ n
2
c) Formula: n = n
3
/ n
2
d) Formula: n = n
2
/ n
1
11.
Which of the following formula is correct according to Snell’s law?
a) Formula: Sin r / Sin i = n
b) Formula: Sin i / Sin r = n
c) Formula: Sin r + Sin i = n
d) Formula: Sin i x Sin r = n
12.
What is the speed of light in air?
a) 2.0 x 10
8
ms
-1
b) 3.0 x 10
8
ms
-1
c) 2.3 x 10
8
ms
-1
d) 3.2 x 10
8
ms
-1
13.
What is the speed of light in vacuum?
a) 2.3 x 10
8
ms
-1
b) 3.0 x 10
8
ms
-1
c) 3.2 x 10
8
ms
-1
d) 2.0 x 10
8
ms
-1
14.
On which of the following index of refraction depends?
a) The image distance
b) The object distance
c) The focal length
d) The speed of light
15.
What is the speed of light in water?
a) 3.0 x 10
8
ms
-1
b) 3.2 x 10
8
ms
-1
c) 2.0 x 10
8
ms
-1
d) 2.3 x 10
8
ms
-1
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