Tag: terms related to reflection of light

Questions Related to terms related to reflection of light

The perpendicular drawn to the surface of the mirror at the point of incidence is known as:

physics reflection of light and shadow terms related with reflection terms related to reflection of light laws of reflection

  1. reflected ray

  2. refracted ray

  3. incident ray

  4. normal ray

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Correct Option: D
Explanation:

According to definition, the perpendicular drawn to the surface of the mirror at the point of incidence is known as normal ray.

If you touch your _____ ear with right hand in front of a plane mirror it will be seen in the mirror that your right ear is touched with _____ hand.
physics reflection of light and shadow terms related with reflection terms related to reflection of light laws of reflection

  1. right, left

  2. left, left

  3. right, right

  4. left, right

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Correct Option: B
Explanation:

Plane mirror shows lateral inversion. Left appears right and right appears left.

One feature of image formed by plane mirrors is lateral inversion which means:

physics reflection of light and shadow terms related with reflection terms related to reflection of light laws of reflection

  1. the top part of the image appears downward and vice versa

  2. left and right sides of the image are interchanged

  3. image appears inverted both sideways and upside down

  4. all the above

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Correct Option: B
Explanation:

When a mirror forms an image, the left and right sides of the image are interchanged. This phenomenon is called lateral inversion as the image is laterally inverted.

Reflection can occur on :

physics reflection of light and shadow terms related with reflection terms related to reflection of light laws of reflection

  1. transparent surfaces

  2. glass

  3. opaque surfaces

  4. a and b

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Correct Option: C
Explanation:

Light can pass through transparent materials, such as glass or air. However it cannot pass through opaque materials and get reflected.

No matter how far you stand from a mirror, your image always appears erect. Then the mirror among the following is likely to be:

physics reflection of light and shadow terms related with reflection terms related to reflection of light laws of reflection

  1. a plane mirror

  2. a concave mirror

  3. any type of mirror

  4. none of the above

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Correct Option: A
Explanation:

If the image always appears erect, then the mirror is either plane or convex. So, on the basis of the given options, the mirror is likely to be a plane mirror.

Fill in the blanks to complete the following sentences:


i) A ray travelling towards the mirror is the ______.
ii) Angle between reflected ray and normal is the ___.
iii) The angle between reflecting surface and the reflected ray is the ______.

physics reflection of light and shadow terms related with reflection terms related to reflection of light laws of reflection

  1. i-incident ray ,ii-angle of reflection ,iii-glancing angle of reflection

  2. i-normal ray ,ii-glancing angle of reflection ,iii-angle of incidence

  3. i-reflected ray ,ii glancing angle of incidence ,iii-glancing angle of reflection

  4. i-reflected ray ,ii-angle of incidence ,iii- angle of reflection

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Correct Option: A
Explanation:

According to definition, 
i) A ray from the object, travelling towards the mirror is the incident ray.
ii) Angle between reflected ray and normal is the angle of reflection.
iii) The angle between reflecting surface and the reflected ray is known as the glancing angle of reflection.

The ray which bounces off the surface of the mirror when the incident ray strikes the mirror is known as ________.  The point at which incident ray meets the mirror is called the _________.
physics reflection of light and shadow terms related with reflection terms related to reflection of light laws of reflection

  1. normal ray, point of reflection

  2. reflected ray, point of refraction

  3. reflected ray, point of incidence

  4. diffracted ray, point of diffraction

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Correct Option: C
Explanation:

According to definition of reflected ray and point of incidence, the ray which bounces off the surface of the mirror when the incident ray strikes the mirror is known as the reflected ray. The point at which incident ray meets the mirror is called the point of incidence.

Fill in the blank:

When angle of incidence increases, glancing angle of incidence ________.

physics reflection of light and shadow terms related with reflection terms related to reflection of light laws of reflection

  1. decreases

  2. increases

  3. remains same

  4. becomes zero

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Correct Option: A
Explanation:

Angle of incidence $+$ Glancing angle of incidence $=90^0$

So, Glancing angle of incidence $=90^0 -$ Angle of incidence
This means, when angle of incidence increases, glancing angle of incidence decreases,

Fill in the blank:

When the angle of incidence increases, glancing angle of reflection _______.

physics reflection of light and shadow terms related with reflection terms related to reflection of light laws of reflection

  1. increases

  2. remains same

  3. decreases

  4. becomes infinite

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Correct Option: C
Explanation:

Angle of incidence $+$ glancing angle of incidence $=90^0$

So, glancing angle of incidence $=90^0 -$ angle of incidence
Now, glancing angle of incidence $=$ glancing angle of reflection
Therefore, glancing angle of reflection $=90^0 -$ angle of incidence
This means, when angle of incidence increases, glancing angle of reflection decreases,

Bouncing of light into the same medium, from which the light ray is incident, is termed as

physics reflection of light and shadow terms related with reflection terms related to reflection of light laws of reflection

  1. Refraction

  2. Diffraction

  3. Reflection

  4. Scattering

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Correct Option: C
Explanation:

$ \bf{Refraction} $ of light is the phenomenon of bending of light or change in the direction of light, when it passes obliquely from one transparent medium to another.

$ \bf{Diffraction} $ is the phenomenon of bending of light waves around the corners of an obstacle or aperture, placed in the path of light beam.

$ \bf{Reflection} $ is the phenomenon in which light rays on striking a polished surface(such as a mirror) bounce back or are sent back into the same medium. 

$\bf{Scattering} $ is the phenomenon by which a beam of light is redirected or deflected in many different directions when it passes through an imperfect medium due to the interaction with the particles of the medium.

Hence, the correct answer is OPTION C.