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Physics 10 Chapter 3 - Geometrical Optics - 2
1.
What are the small packets of energy called that are present in light?
a) Photons
b) Electrons
c) Protons
d) Positrons
2.
How many natures light have?
a) Two
b) Three
c) Four
d) One
3.
Which of the following natures light have?
a) (b) Light nature
b) (a) Both b and c
c) (c) Particle nature
d) (d) Wave nature
4.
When a ray of light from air falls on the surface of plane mirror, it is.......................?
a) Reflected
b) Refracted
c) Diffracted
d) Rarefied
5.
What is the ray called that is incident on the surface of plane mirror?
a) Reflected ray
b) Refracted ray
c) Incident ray
d) Diffracted ray
6.
What is the angle between incident ray and the normal of plane mirror called?
a) Angle of reflection
b) Angle of refraction
c) Angle of incidence
d) Angle of diffraction
7.
What is the angle between reflected ray and the normal of plane mirror called?
a) Angle of diffraction
b) Angle of reflection
c) Angle of incidence
d) Angle of refraction
8.
When light travelling in a certain medium falls on the surface of another medium, a part of it turns back into the same medium. What is this phenomena called?
a) Diffraction of light
b) Interference of light
c) Reflection of light
d) Refraction of light
9.
How many law(s) of reflection are there?
a) Two
b) Three
c) One
d) Four
10.
According to laws of reflection, which of the following is true?
a) Sine of angle of incidence = Sine of angle of reflection
b) Incident ray, normal and reflected ray all lie in same plane
c) Incident ray = Reflected ray
d) Angle of incidence = Angle of reflection
11.
According to laws of reflection, which of the following is true?
a) Sine of angle of incidence = Sine of angle of reflection
b) Incident ray, normal and reflected ray do not lie in same plane
c) Incident ray = Reflected ray
d) Angle of incidence = Angle of reflection
12.
In how many directions, smooth surface of silver reflects light?
a) One
b) Two
c) Four
d) Three
13.
What is reflection by smooth surfaces called?
a) Regular reflection
b) Regular refraction
c) Irregular reflection
d) Irregular refraction
14.
Light rays are reflected in a mirror, causing us to see.........................?
a) An upright image
b) A real image
c) Same image
d) An inverted image
15.
What is reflection by rough surfaces called?
a) Regular reflection
b) Irregular refraction
c) Irregular reflection
d) Regular refraction
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