1. Objects which are able to emit light are known as ______ 2. Passing electricity through certain gases at a very low pressure can

Question

Fill in the Blanks. 

1. Objects which are able to emit light are known as ______ 

2. Passing electricity through certain gases at a very low pressure can produce ______ 

3. ______ is a simple device which helps us to understand about the rectilinear propagation of light. 

4. The light falling on the mirror is called ______ as and the light reflected is called 

5. The angle formed between the reflected ray and the normal is ______ 

Answer 1

1. light sources 

2. Light 

3. Pin-hole camera 

4. incident ray, reflected ray 

5. angle of reflection