Tag: reflection of light and shadow

Questions Related to reflection of light and shadow

Fill in the blank:

A boy blinks his right eye. Mirror image of the boy blinks its ______ eye.

physics reflection of light and shadow lateral inversion right or left reflection at plane surface

  1. both

  2. right

  3. none

  4. left

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Correct Option: D
Explanation:

Due to lateral inversion by mirror, right appears on left and left appears on right.

The image formed by a plane mirror is always ....... inverted.

physics reflection of light and shadow lateral inversion right or left reflection at plane surface

  1. laterally

  2. virtually

  3. really

  4. none

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Correct Option: A
Explanation:

The image formed by a plane mirror is always Laterally inverted.

Mark correct option.

physics reflection of light and shadow lateral inversion right or left reflection at plane surface

  1. The laws of reflection of light hold only for plane surfaces

  2. The size of virtual image can be measured by receiving it on screen

  3. Plane mirror alongs form an erect image

  4. Plane mirror may form inverted image

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Correct Option: D
Explanation:

Let solve it by each option

  1. Law of reflection of light holds good for all the mirrors irrespective of their shape and size, hence option A is false
  2.  A virtual image cannot be caught on screen so we cannot measure the size, it is also a false statement
  3. Plane mirror always forms a virtual image, hence it's a false statement
  4. Light rays  which comes from the object  get reflected from plane mirror and reaches to human eye, at this point human feel that reflected ray is coming from the mirror . This is the reason why object looks laterally inverted
  5. Hence option D is the right answer

You are given four sources of light each one providing a light of a single colour red, blue, green and yellow. Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is 90. Which of the following statements is correct, if the source of yellow light is replaced with that of other lights without changing the angle of incidence?

physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

  1. The beam of red light would undergo total internal reflection.

  2. The beam of red light would bend towards normal while it gets refracted through the second medium.

  3. The beam of blue light would undergo total internal reflection.

  4. The beam of green light would bend away from the normal as it gets refracted through the second medium.

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Correct Option: C
Explanation:

For yellow light, r=90$^{\circ}$, when $i=c$ since $i$ is kept $c$ should be smaller for total reflection

$\mu = \cfrac{1}{\sin{c}}$ 
If $c$ is small, $\mu$ will be large.
$\therefore c $ will be smallest for this colour.
Hence, blue colour will undergo total internal reflection.

A real image is formed when two or more

physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

  1. reflected rays meet

  2. refracted rays meet

  3. reflected rays appear to meet

  4. rays actually meet

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Correct Option: A,B,D
Explanation:

the real image is formed when two or more reflected or refracted rays actually meet at a point.

Select the odd one out w.r.t. the type of reflection of incident light

(wood, steel, silver, mirror, graphite)

physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

  1. mirror

  2. wood

  3. silver

  4. steel

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Correct Option: A
Explanation:

Except mirror all other causes irregular reflection

State whether true or false.
Regular reflection takes place when the light beam falls on a highly polished surface.

physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

  1. True

  2. False

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Correct Option: A
Explanation:

A highly polished surface acts like a reflecting surface which allows regular reflection to take place.

State whether true or false.
Regular reflection is produced when light falls on the rough walls.

physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

  1. True

  2. False

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Correct Option: B
Explanation:

Regular reflection is produced when light falls on highly polished surface.

Regular reflection takes place when light is incident on:

physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

  1. a rough curved surface

  2. a highly polished plane surface

  3. either of A and B

  4. neither of A and B

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Correct Option: B
Explanation:

When parallel rays of light are incident on a highly polished plane surface, after reflection, the rays emerge parallel as well. This type of reflection is called regular reflection.

Type of reflection in which images are formed and reflection occurs from a smooth surface like that of mirror is known as: 

physics reflection of light and shadow regular and irregular reflection regular and diffused reflection laws of reflection

  1. diffused reflection

  2. regular reflection

  3. irregular reflection

  4. none of these

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Correct Option: B
Explanation:

Regular reflection occurs from smooth surfaces and images are formed in this type of reflection.