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Regular and irregular reflection - class-VII

regular and irregular reflection

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Questions

Question 1 Multiple Choice (Multiple Answers)

A real image is formed when two or more

  1. reflected rays meet
  2. refracted rays meet
  3. reflected rays appear to meet
  4. rays actually meet
Question 2 Multiple Choice (Single Answer)

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

(wood, steel, silver, mirror, graphite)

  1. mirror
  2. wood
  3. silver
  4. steel
Question 3 Multiple Choice (Single Answer)
State whether true or false.
Regular reflection takes place when the light beam falls on a highly polished surface.
  1. True
  2. False
Question 4 Multiple Choice (Single Answer)
State whether true or false.
Regular reflection is produced when light falls on the rough walls.
  1. True
  2. False
Question 5 Multiple Choice (Single Answer)

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
Question 6 Multiple Choice (Single Answer)

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
Question 7 Multiple Choice (Single Answer)

Irregular reflection occurs due to:

  1. failure of laws of reflection
  2. irregularity in reflecting surface
  3. irregular light
  4. all of these
Question 8 Multiple Choice (Single Answer)

Moon is visible to us because:

  1. it reflects light
  2. it refracts light
  3. it emits light
  4. it absorbs light
Question 9 Multiple Choice (Single Answer)

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
Question 10 Multiple Choice (Single Answer)

Which of the following can form image?

  1. Diffused reflection
  2. Irregular reflection
  3. Regular reflection
  4. All of these
Question 11 Multiple Choice (Single Answer)

Mark the statement which is true for diffused reflection:

  1. Diffused reflection is due to failure of laws of reflection
  2. It is caused due to irregularities in the reflecting surface
  3. When the incident light is diffused in nature it causes diffused reflection
  4. All are true
Question 12 Multiple Choice (Single Answer)

Why we are not able to see our image on a cardboard even though it reflects light?

  1. Because cardboard does not shine like mirror
  2. Because cardboard is not as durable as mirror
  3. Because cardboard's surface is irregular
  4. All
Question 13 Multiple Choice (Single Answer)

Which of the following is /are type of reflection ?

  1. Regular reflection
  2. Irregular reflection
  3. Diffused reflection
  4. All of the above
Question 14 Multiple Choice (Single Answer)

When light is incident on a polished surface ___________ reflection takes place.

  1. regular
  2. irregular
  3. both (a) and (b)
  4. None of these
Question 15 Multiple Choice (Single Answer)

Which surfaces will reflects most of the light falling on them?

  1. Flat surface
  2. Shiny surface
  3. Smooth surface
  4. Opaque surface
Question 16 Multiple Choice (Single Answer)

A bus driver is reversing his bus at a speed $8 m s^{-1}$. The rear view mirror of a bus is a plane mirror. The driver sees in his rear view mirror the image of a car parked behind his bus. The speed at which the image of the car appears to approach the driver will be

  1. $2 m s^{-1}$
  2. $4 m s^{-1}$
  3. $8 m s^{-1}$
  4. $16 m s^{-1}$
Question 17 Multiple Choice (Single Answer)

Diffused reflection

  1. may produce image
  2. never produce image
  3. must produce image
  4. None of these
Question 18 Multiple Choice (Single Answer)

Irregular reflection obeys laws of reflection .

  1. True
  2. False
Question 19 Multiple Choice (Single Answer)

Reflection from a smooth surface is called __________ reflection.

  1. Regular
  2. Irregular
  3. Multiple
  4. Total internal
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