. What is pollution?

Related questions

Gobar gas is a

---

What is principal focus for concave lens

---

Why is convex lens called converging lens

---

What is meant by heating effect of electric current

---

What happens when dilute hydrochloric acid is added to iron filings? Tick the correct answer

---

Why does the sky appear dark instead of blue to an astronaut

---

Why is a normal eye not able to see clearly the objects placed closer than 25 cm

---

The near point of a hypermetropic eye is 1m. What is the power of the lens required

---

Make a diagram to show how hypermetropia is corrected

---

The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem

---

A person needs a lens of power

---

The change in focal length of an eye-lens is caused by the action of the

---

The least distance of distinct vision for a young adult with normal vision is about

---

The human eye forms the image of an object at its:

---

The human eye can focus objects at different distances by adjusting the focal length of the eye-lens. This is due to

---

A student has difficulty in reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be

---

What are the far point and near point of the human eye with normal vision

---

A person with a myopic eye cannot see objects beyond 1.2m distinctly. What should be the type of the corrective lens used to restore proper vision

---

What is meant by the power of accommodation of the eye

---

A doctor has prescribed a corrective lens of power

---