TEST 01 - LIGHT

 1. Choose the correct option. (1 x 4 = 4) 

a) Which one of the materials cannot be used to make a lens? 

1. Water 
2. Glass 
3. Plastic  
4. Clay

 b) The angle of reflection is equal to the angle of incidence 

1. always 
2. sometimes 
3. under special conditions  
4. never 

c) The image formed by a plane mirror is: 

1. virtual, behind the mirror and enlarged.  
2. virtual, behind the mirror and of the same size as the object. 
3. real, at the surface of the mirror and enlarged. 
4. real, behind the mirror and of the same size as the object. 

d) According to concept of the spherical mirror what does P stands for: 

1. Pole 
2. Principle axis 
3. Position 
4. Principle line

2. Answer the following questions. (any three) (2 x 3 = 6) 

a) Explain laws of reflection with a proper diagram. 

b) Define: i. Real Image ii. Virtual Image iii. Light 

c) Write down the uses of convex mirror. 

d) Write down the uses of concave mirror. 

3. Answer the following questions. (3 x 2 = 6) 

a) Define with help of a diagram 

i. Radius of curvature ii. Centre of curvature iii. Pole iv. Principle axis 

b) What is a plane mirror? An object is placed at a distance of 12 cm in front of a concave mirror. It forms a real image four time larger than the object. Calculate the distance of image from the mirror.