Tag: laws of reflection

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Questions Related to laws of reflection

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

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?

  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.
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Regular reflection takes place when light is incident on:

  1. a rough curved surface

  2. a highly polished plane surface

  3. either of A and B

  4. neither of A and B
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  1. diffused reflection

  2. regular reflection

  3. irregular reflection

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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

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

Irregular reflection occurs due to:

  1. failure of laws of reflection

  2. irregularity in reflecting surface

  3. irregular light

  4. all of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Irregular reflection occurs when parallel rays of light are incident on an irregular or rough surface and after reflection emerge in different directions. This type of reflection occurs due to irregularity of the reflecting surface.

Regular reflections occur from smooth or polished surfaces.

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

When all the parallel rays reflected from a plane surface are parallel, the reflection is known as:

  1. regular reflection

  2. irregular reflection

  3. diffused reflection

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When all the parallel rays reflected from a plane surface are parallel, the reflection is known as regular reflection .