Tag: images in plane mirror

Question 1

A ball of $1\ g$ released down an inclined plane describes a circle of radius $10\ cm$ in the vertical plane on reaching the bottom. The minimum height of the inclined plane is

physics light, shadows and images introduction to reflection of light light and sight images in plane mirror

$10\ cm$
$15\ cm$
$20\ cm$
$25\ cm$

Answer

Correct Option: A

Question 2

If a ray of light passes from a denser medium to a rarer medium in a straight line, the angle of incident must be _____

physics light, shadows and images introduction to reflection of light light and sight images in plane mirror

$0^o$
$30^o$
$60^o$
$90^o$

Answer

Correct Option: A

Question 3

While is not basic transformation function

physics light, shadows and images introduction to reflection of light light and sight images in plane mirror

Translation
Rotating
Scaling
Reflection

Answer

Correct Option: D

Question 4

A ray of light is incident on a plane mirror along a vector $\hat i+\hat j-\hat k$. The noemal on incident point is along $\hat i+\hat j$. Then unit vector along the reflected ray is:

physics light, shadows and images introduction to reflection of light light and sight images in plane mirror

$ \dfrac { 1 }{ \sqrt { 3 } } \left( \hat { i } +\hat { j } +\hat { k } \right)$
$-\dfrac { 1 }{ \sqrt { 3 } } \left( \hat { i } +\hat { j } +\hat { k } \right)$
$ \dfrac { 1 }{ \sqrt { 3 } } \left( -\hat { i } -\hat { j } +\hat { k } \right)$
$ \dfrac { 1 }{ \sqrt { 3 } } \left( -\hat { i } +\hat { j } +\hat { k }\right)$

Answer

Correct Option: C

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