SSC (Marathi Semi-English) 10th Standard Board Exam [इयत्ता १० वी] - Maharashtra State Board Important Questions for Science and Technology 1

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	______	______

When a ray of light travels from air to glass slab and strikes the surface of separation at 90°, then it …………….
(a) bends towards normal
(b) bends away from normal
(c) passes unbent
(d) passes in zigzag way

Explain how spectrum is formed.

When rays of light are incident on a glass slab then the incident ray and emergent ray are _________ each other.

1. perpendicular
2. parallel
3. opposite
4. concurrent

What is a spectrum?

Write a short note on dispersion of light.

Define refraction and state the laws of refraction.

Explain how the formation of a rainbow occurs.

Why do we get a spectrum of seven colors when white light is dispersed by a prism?

Observe the following figure and answer the questions given under it:

1) How many times does refraction take place in the above figure?

2) What happens to the ray of light when it passes from air to glass?

3) What happens to the ray of light when it passes from glass to air?

4) What are the rays AB and CD in the figure called?

5) Define refraction.

Observe the figure and write accurate conclusion regarding refraction of light.

What is the correct reason for blinking / flickering of stars? Explain it.
a) The blasts in the stars.
b) Absorption of star light by the atmosphere.
c) Motion of the stars.
d) Changing refractive index of gases in the atmosphere.

Choose and write the correct option.

If we gradually increase the angle of incidence of a ray of light passing through prism then …..

Choose the correct alternative and rewrite the following:

A glass slab is placed in the path of convergent light. The point of convergence of light

The phenomenon of change in the direction of light when it passes from one transparent medium to another is called ___________.