Practice Sheets on Light Reflection & Refraction

Light reflection and refraction Worksheet-13

1. A ray of light passing through centre of curvature of a concave mirror retraces its path on reflection. Why?

2. A ray of light passing through focus of a concave mirror becomes parallel to the principal axis of the mirror on reflection. True or false

3. Does the position, size and nature of the image formed by a concave mirror depend on the position of the object ?

4. Where is the image formed when an object is at large distance from a concave mirror ?

5. A concave mirror serves as doctor's head mirror. How ?

Light reflection and refraction Worksheet-14

1. For what position of the object will a convex lens form a virtual and erect image?

2. For what position of an object, a real, inverted and diminished image is formed by a convex lens?

3. An object is placed between F and 2 F of a convex lens. What is the nature of the image formed  ?

4. Where should an object be placed in order to use a convex lens as a magnifying glass ?

5. What is the difference between lens formula and mirror formula ?

Light reflection and refraction Worksheet-15

1. The image of a distant object is formed at 30 cm from a concave mirror. What is the focal length of the mirror ?

2. The radius of curvature of concave mirror is 50 cm. Where should an object be held from the mirror so as to form its image at infinity ?

3. A man standing in front of a special mirror finds his image having a small face, big tummy and legs of normal size. What are the shapes of three parts of the mirror ?

4. On what factors does the focal length of a spherical mirror depend ?

5. Can you change focal length of a given spherical mirror by changing the object distance from the mirror?