Plane Mirror Optics - Class VIII
Properties of images formed by plane mirrors, including virtual/erect characteristics, image distances, multiple reflections between parallel and inclined mirrors, and reflection geometry
Questions
Virtual image is always erect
- True
- False
Formation of erect image is a characteristic of which of the following mirrors ?
- Plane Mirror
- Concave mirror
- Convex mirror
- All the above
Choose the correct option regarding the image formed by a plane mirror
- It is real
- It is erect
- It is inverted
- None of the above
Which of the following is a characteristic of the image formed by a plane mirror ?
- The image is twice in size as the object.
- The image is nearer from the mirror as the object is in front of it.
- The image is real
- The image is erect
When you see your reflection in the inner surface of the spoon, choose the correct option regarding the image formed
- The image formed will be erect only, it can not be inverted
- The image formed will be inverted only, it can not be erect
- The image formed can be both erect or inverted depending upon distance of your face and the spoon
- The image formed will be real
A small object is placed 10cm in front of a plane mirror. If you stand behind the object 30 cm from the object and look at its image, the distance focused for your eye will be :
- $60 cm$
- $20cm$
- $40 cm$
- $80 cm$
A monochromatic ray of light in glass strikes the glass air interference normally. which of the following correct?
- The ray is totally reflected into glass
- The ray passes into air such that the
refracted ray bends away from the normal - The ray passes into air undeviated and with an increase in its speed.
- The ray passes into air with an increase in its frequency.
Two plane mirrors A and B are aligned parallel to each other, as shown in figure. A light ray is incident at an angle $30$ at a point just inside one end of A. The plane of incidence coincides with the plane of the figure.The maximum number of times the ray undergoes reflections ( including the first one) before it emerges out is:
- $28$
- $30$
- $32$
- $34$
Two plane mirrors are inclined to each other such that a ray of light incident on the first mirror $\left( { M } _{ 1 } \right) $ and parallel to the second mirror $\left( { M } _{ 2 } \right) $ is finally reflected from the second mirror $\left( { M } _{ 1 } \right) $ parallel to the two mirroes will be :
- ${ 90 }^{ 0 }$
- ${ 75 }^{ 0 }$
- ${ 45 }^{ 0 }$
- ${ 60 }^{ 0 }$
Two plane mirror are inclined to each other such that a ray of light incident on the first mirror $\left( { M } _{ 1 } \right) $ and parallel to the second mirror $\left( { M } _{ 2 } \right) $ is finally reflected form th second mirror $\left( { M } _{ 2 } \right) $ parallel to the first mirror $\left( { M } _{ 1 } \right) $ the angle between the two mirrors will be :
- ${ 60 }^{ 0 }$
- $75^{ 0 }$
- $90^{ 0 }$
- $45^{ 0 }$
a particle is moving in front of a plane mirror as shown in figure. Velocity of image with respect to object is -
- $V sin \theta$
- $V cos \theta$
- $2V sin \theta$
- $2 V cos \theta$
If the mirror is displaced by a distance 4 cm, towards the object, the image is displaced by
- 12 cm
- 4 cm
- 6 cm
- 8 cm
A ray of light is incident on a plane mirror along a vector $\hat {i} + \hat {j} - \hat {k}$, then find the direction of reflected ray if normal is $\hat i + \hat j$
- $\hat {i} + \hat {j} - \hat {k}$
- $-\hat {i} + \hat {j} - \hat {k}$
- $-\hat {i} - \hat {j} - \hat {k}$
- $\hat {i} + \hat {j} + \hat {k}$
When you see reflection of your own in the surface of water, Choose the correct option
- The image formed is real
- The image formed is inverted
- The image formed is erect
- None of the above
For which of following condition there is no emergent light whatever may be the angle of incidence?
- $ A < 2C $
- $ A > C $
- $ A > 2C $
- $ A < C $