When we see the eyes of a person through the lenses of spectacles, work by him, they looked small in size ?
What types of lens are they ?

When we see the eyes of a person through the lenses of spectacles, work by him, they looked small in size ? What is the vision defect ?

What is Lens ? What are types of lenses ?

Shashank went to the optician to get his eyes checked. He observed that the doctor combined two lenses and put these in front of his eyes so that he could see clearly. The powers of the two lenses used in the combination were -3 D and 4 D. What type of lens will the combination of lenses be?

When we observe the lower surface of a leaf through a magnifying lens we see numerous small openings. Which of the following is the term given to such openings ?

Kishore wore spectacles. When you saw through his spects the size of his eyes seemed bigger than their original size. Which lens did he use ?

A person with defective eyes can see the objects distinctly up to the distance 20 cm . What type of lens should be used and of what power?

Things always look small on viewing through a lens. What is the nature of the lens?