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Observe the figure and answer the following questions:
- Name the defect of vision represented in the above figure.
- State the reasons for this defect.
- How is it corrected?
- Draw the diagram to show the correction of this defect.
Concept: Defects of Vision and Their Corrections > Myopia
Concept: Spherical Mirror > Concave Mirror
Concept: Spherical Mirror > Concave Mirror
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 | ______ | ______ |
Concept: Defects of Vision and Their Corrections > Myopia
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
Concept: Refraction of Light Through a Rectangular Glass Block
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
Concept: Refraction of Light Through a Rectangular Glass Block
Explain how spectrum is formed.
Concept: Refraction of Light Through a Rectangular Glass Block
Explain how spectrum is formed.
Concept: Refraction of Light Through a Rectangular Glass Block
When rays of light are incident on a glass slab then the incident ray and emergent ray are _________ each other.
- perpendicular
- parallel
- opposite
- concurrent
Concept: Refraction of Light Through a Rectangular Glass Block
When rays of light are incident on a glass slab then the incident ray and emergent ray are _________ each other.
- perpendicular
- parallel
- opposite
- concurrent
Concept: Refraction of Light Through a Rectangular Glass Block
What is a spectrum?
Concept: Refraction of Light Through a Rectangular Glass Block
What is a spectrum?
Concept: Refraction of Light Through a Rectangular Glass Block
Write a short note on dispersion of light.
Concept: Refraction of Light Through a Rectangular Glass Block
Write a short note on dispersion of light.
Concept: Refraction of Light Through a Rectangular Glass Block
Define refraction and state the laws of refraction.
Concept: Refraction of Light Through a Rectangular Glass Block
Define refraction and state the laws of refraction.
Concept: Refraction of Light Through a Rectangular Glass Block
| Column I | Column II | Column III | |
| 1 | Dispersion | Long-sightedness | Twinkling of stars |
| 2 | Refraction | Splitting of white light into component colours | Convex lens |
| 3 | Hypermetropia | Change in the direction of the ray of light due to change in medium | Spectrum of seven colours |
Concept: Refraction of Light
Explain how the formation of a rainbow occurs.
Concept: Refraction of Light Through a Rectangular Glass Block
Explain how the formation of a rainbow occurs.
Concept: Refraction of Light Through a Rectangular Glass Block
Why do we get a spectrum of seven colors when white light is dispersed by a prism?
Concept: Refraction of Light Through a Rectangular Glass Block
