SEBA Class 7 Science Important Chapter 4 Fun with Light: Shadow and Reflection

SEBA Class 7 Science Important Chapter 4 Fun with Light: Shadow and Reflection Solutions English Medium As Per SCERT New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters SEBA Class 7 Science Important Chapter 4 Fun with Light: Shadow and Reflection Notes and select need one. SEBA Class 7 Science Important Notes in English Download PDF. SCERT Class 7 Science (Amar Bijnan) Additional Solutions in English.

SEBA Class 7 Science Important Chapter 4 Fun with Light: Shadow and Reflection

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. SCERT Class 7 Science (Amar Bijnan) Extra Solutions in English are part of All Subject Solutions. Here we have given SCERT Class 7 Science Additional Notes in English for All Chapters, You can practice these here.

Fun with Light: Shadow and Reflection

Chapter: 4

PART – I

IMPORTANT QUESTION ANSWER

Short Type Question and Answers:

1. What are luminous objects? 

Ans: Objects that emit their own light, such as the Sun, stars, and electric bulbs, are called luminous objects.

2. What is bioluminescence? 

Ans: It is the process by which living organisms, like fireflies, convert chemical energy into light energy through chemical reactions in their bodies.

3. Define a medium in the context of light. 

Ans: A medium is a substance, such as air, water, or glass, through which light can pass.

4. What are transparent materials? 

Ans: Materials that allow light to pass through them completely, enabling us to see through them clearly, are called transparent materials.

5. What is a shadow? 

Ans: A shadow is a dark region or shape formed when an opaque object blocks the path of light.

6. What is the reflection of light? 

Ans: Reflection is the change in the direction of light when it falls on certain surfaces, such as shiny metal sheets or mirrors.

7. What is lateral inversion? 

Ans: Lateral inversion is a phenomenon where the left side of an object appears as the right side in its mirror image, and vice versa.

8. What kind of image is formed by a pinhole camera? 

Ans: A pinhole camera forms an inverted (upside-down) image on a screen.

9. What is a reflector? 

Ans: A surface from which light is reflected is called a reflector.

10. What is the purpose of a periscope? 

Ans: A periscope uses the reflection of light from two mirrors to allow a person to see objects that are not directly visible, such as those over a tall wall.

Fill in the Blanks:

1. Objects like the moon and planets that do not emit their own light are called __________ objects.

Ans: Non – luminous.

2. Light always travels in a ______ line.

Ans: Straight.

3. A shadow is always formed on the _____________ side of the light source.

Ans: Opposite.

4. Any smooth or shiny surface acts like a _____________.

Ans: Mirror.

5. A ___________ camera can be used to form images of the Sun and other luminous objects.

Ans: Pinhole.

True or False:

1. The moon is a luminous object. 

Ans: False; it is non-luminous and visible due to reflected sunlight.

2. Light travels in the form of rectilinear propagation.

Ans: True.

3. The color of a shadow is the same as the color of the object. 

Ans: False; shadows are always dark/black.

4. A plane mirror forms an inverted image. 

Ans: False; it forms an erect image, though it is laterally inverted.

5. Light can pass partially through translucent objects.