ICSE Worksheet for chapter-13 Reflection of Light at a Plane class 9

ICSE Worksheet for chapter-13 Reflection of Light at a Plane class 9

Worksheet For class 9

• Lens, Types of lenses, Terms related to a lens, Types of images – Real and Virtual
• Characteristics and location of images for a convex lens and concave lens
• Power, Magnification and Determination of focal length of a lens

SECTION 1 – OBJECTIVE

1. Images formed by plane mirror are
   1. Real
   2. Virtual
   3. Magnified
   4. NOT
2. We see things around us because of _ _ _ _ _
   1. Reflection
   2. Refraction
   3. Absorption
   4. NOT
3. Which of the following is a natural luminous source of light?
   1. Sunlight
   2. Wood
   3. Electric lamp
   4. Torch light
4. Which of the following is not a translucent object?
   1. Greased paper
   2. Paraffin wax
   3. Frosted glass
   4. Water
5. Light is a form of
   1. Electromagnetic wave
   2. Energy
   3. Both A& B
   4. NOT
6. In diffused reflection, laws of reflections are
   1. Violated
   2. Followed
   3. Both A & B
   4. NOT
7. Which of the following is true for virtual image?
   1. It can’t be obtained on a screen
   2. It is erect with respect to object
   3. It is formed when reflected rays are produced backwards
   4. All of them
8. If the angle of incidence is 40 ⁰ , then angle between the incident ray and reflected ray is
   1. 40 ⁰
   2. 60 ⁰
   3. 80 ⁰
   4. 120 ⁰
9. Plane mirror are arranged parallel to each other to get
   1. A single image
   2. Two images
   3. A large number of reflected images
   4. No image
10. The exchange of the right & left side of an object & its image is known as
    1. Reflection
    2. Lateral inversion
    3. Refraction
    4. NOT
11. If the two plane mirrors are inclined at an angle of 60 ⁰ , then the number of images formed by the object placed between these mirrors is
    1. 4
    2. 3
    3. 5
    4. 6
12. The image formed in a periscope are-
    1. Real with lateral inversion
    2. Virtual with lateral inversion
    3. Real without lateral inversion
    4. Virtual without lateral inversion

SECTION II - SUBJECTIVE

1. Define the following :
   1. Reflection of light
   2. Angle of reflection
   3. Plane mirror
   4. Point of incidence
2. State any 4 uses of plane mirror.
3. Draw a neat and labeled diagram of periscope.
4. Differentiate between real and virtual image.
5. Write the characteristics of the image formed by a plane mirror.
6. An object is placed between two plane mirrors inclined at an angle of 50 ⁰ . Find the number of images formed.
7. Prove that in plane mirror, the object distance and the image distance are equal.

Solutions: to worksheet-13 Topic - Reflection of Light at a Plane class 9

Objective Problems

Subjective Problems

5. Number of images formed = 7