The least distance of distinct vision for a normal eye is?

Presbyopia is corrected by using?

The twinkling of stars is due to?

The part of the eye that controls the amount of light entering is?

Myopia is also known as?

The image is formed on which part of the eye?

Dispersion of light is demonstrated by?

The danger signals are red because red light?

Astigmatism is corrected by?

The refractive index of the atmosphere decreases with?

Rainbow is formed due to?

The far point of a myopic eye is?

The optic nerve carries signals from the eye to the?

Acids turn blue litmus paper to?

The pH value of a neutral solution is?

Which of the following is a strong acid?

Bases turn red litmus paper to?

The chemical formula of baking soda is?

Plaster of Paris is?

The reaction between acid and base is called?

pH scale ranges from?