Fill in the blank in
The size of the pupil becomes ______ when you see in dim light.

The pigment that helps eye to see in dim light is

Fill in the blank with the correct alternative. You have to do ______ intensive training to become a nurse.

The deficiency of this vitamin makes it difficult to see in dim light:

Fill in the blanks with suitable Interrogative Pronouns: When you speak to him remember to ..... you are speaking.

Fill in the blanks with suitable words : (a) When a ray of light enters a prism, it bends………….the normal , as it leaves the prism, it bends…………the normal. (b) White light is composed of…………..colours. The colour of white light deviated through the largest angle by a prism is............

Fill in the blank with suitable word He has seen the bird ..... you describe.