SSC (English Medium) 10th Standard - Maharashtra State Board Important Questions for Science and Technology 1

Kavita from 10th is using spectacles. The power of the lenses in her spectacles is –2.5 dioptre. Answer the following questions:

1) Which lenses are used in her spectacles?

2) State the defect of vision Kavita is suffering from.

3) Find the focal length of the lenses used in her spectacles

An object is held 20 cm away from a converging lens of focal length 10 cm. Find the position of the image formed.

Name the defect shown in the diagram.

At which position will you keep an object in front of convex lens to get a real image smaller than the object? Draw a figure.

Observer the following diagram and answer the questions.
a) Which eye defect is shown in this diagram?
b) What are the possible reasons for this eye defect?
c) How this defect is corrected, write it in brief?

Surabhi from std. X uses spectacle. The power of the lenses in her spectacle is 0.5 D.

Answer the following questions from the given information:

1. Identify the type of lenses used in her spectacle.
2. Identify the defect of vision Surabhi is suffering from.
3. Find the focal length of the lenses used in her spectacle.

Rewrite the following table so as to match second and third column with first column.

Anuja cannot see the blackboard writing but she can see nearby things.
(a) What is the eye defect she is suffering from?
(b) State the possible reason for her defect.
(c) How is it corrected

Anuja’s father cannot see nearby objects clearly.
(a) What is the eye defect he is suffering from?
(b) How is it corrected?

In Myopia the human eye _______.

Write scientific reason.

Nearsightedness, this defect can be corrected by using spectacles with concave lens.

If focal length of a convex lens is 20 cm at what is the power of the lens?

Two convex lenses of focal length 30 cm and 10 cm each are kept in contact with each other. Find the power of their combination.

Complete the correlation:

Farsightedness : Convex lens : : Presbyopia : ______

Write a short note on Presbyopia.

Observe the figure whether it is correct or not and explain the phenomenon.

The power of convex lens of focal length 20 cm is ______.

Observe the figure and answer the following questions: 

1. Name the defect of vision represented in the above figure.
2. State the reasons for this defect.
3. How is it corrected?
4. Draw the diagram to show the correction of this defect.

Complete the following table by observing the given figures:

Figure →
Points ↓
(a) Name of the defect	______	______
(b) Position of the image	______	______
(c) Lens used to correct the defect	______	______

What are amphoteric oxides?