Class 6 Exam  >  Class 6 Tests  >  Science Olympiad Class 6  >  Olympiad Test: Light, Shadows And Reflection - 2 - Class 6 MCQ

Olympiad Test: Light, Shadows And Reflection - 2 - Class 6 MCQ


Test Description

10 Questions MCQ Test Science Olympiad Class 6 - Olympiad Test: Light, Shadows And Reflection - 2

Olympiad Test: Light, Shadows And Reflection - 2 for Class 6 2024 is part of Science Olympiad Class 6 preparation. The Olympiad Test: Light, Shadows And Reflection - 2 questions and answers have been prepared according to the Class 6 exam syllabus.The Olympiad Test: Light, Shadows And Reflection - 2 MCQs are made for Class 6 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Olympiad Test: Light, Shadows And Reflection - 2 below.
Solutions of Olympiad Test: Light, Shadows And Reflection - 2 questions in English are available as part of our Science Olympiad Class 6 for Class 6 & Olympiad Test: Light, Shadows And Reflection - 2 solutions in Hindi for Science Olympiad Class 6 course. Download more important topics, notes, lectures and mock test series for Class 6 Exam by signing up for free. Attempt Olympiad Test: Light, Shadows And Reflection - 2 | 10 questions in 20 minutes | Mock test for Class 6 preparation | Free important questions MCQ to study Science Olympiad Class 6 for Class 6 Exam | Download free PDF with solutions
Olympiad Test: Light, Shadows And Reflection - 2 - Question 1

A girl is 2 m away from a plane mirror. If she moves away from the mirror by 0.5 m, what will be the new distance between the object and its image?

Detailed Solution for Olympiad Test: Light, Shadows And Reflection - 2 - Question 1

After shifting object 0.5m away from mirror, the distance between the object and the mirror = 2.5 m.

Hence, distance between object and image is 2x2.5 m = 5 m.

Olympiad Test: Light, Shadows And Reflection - 2 - Question 2

The focus of a concave mirror is __________.

Detailed Solution for Olympiad Test: Light, Shadows And Reflection - 2 - Question 2

A concave mirror is said to have a real focus whereas a convex mirror is said to have a virtual foucs.

1 Crore+ students have signed up on EduRev. Have you? Download the App
Olympiad Test: Light, Shadows And Reflection - 2 - Question 3

When light falls on the following objects, which among them would show the darkest shadows?

Detailed Solution for Olympiad Test: Light, Shadows And Reflection - 2 - Question 3
Explanation:
To determine which object would show the darkest shadows when light falls on them, we need to consider the transparency and opaqueness of each object. The object that allows the least amount of light to pass through will create the darkest shadows.
Analysis of each object:
1. A sheet of thin tissue paper:
- Tissue paper is thin and translucent.
- It allows a significant amount of light to pass through.
- As a result, the shadows formed by tissue paper would be relatively light.
2. A glass window:
- Glass is transparent and allows a high amount of light to pass through.
- The shadows formed by a glass window would be relatively light.
3. A wooden chopping board:
- Wood is an opaque material that does not allow light to pass through.
- When light falls on a wooden chopping board, it creates a well-defined and dark shadow.
- Hence, a wooden chopping board would show the darkest shadows among the given objects.
4. Water in a glass:
- Water is transparent and allows light to pass through.
- However, the presence of water in a glass may diffuse the light and create softer shadows compared to transparent materials like glass.
Conclusion:
Among the given objects, the wooden chopping board would show the darkest shadows when light falls on them. This is because wood is an opaque material that blocks most of the light, resulting in well-defined and dark shadows.
Olympiad Test: Light, Shadows And Reflection - 2 - Question 4

A boy did the following experiment.
He kept a wooden cube in front of a screen. He had three torches with him.

Without changing the position of the cube and the screen, he placed the other two torches one after the other, in the position of torch 1, and saw the shadow.
Q. Which torch will make the largest shadow(umbra) on the screen?

Olympiad Test: Light, Shadows And Reflection - 2 - Question 5

Answer the following questions based on the images below.

Q. Natural light sources include sun, glowing rocks (lava from volcanoes), and ___________.

Olympiad Test: Light, Shadows And Reflection - 2 - Question 6

Answer the following questions based on the images below.

Q. Are candles, light bulbs, flame, CFL’s, tube-lights, kerosene lamps etc. man-made or natural sources of light?

Olympiad Test: Light, Shadows And Reflection - 2 - Question 7

Let us take these three objects (glass tumbler, coloured glass and wooden block).Keep them on the table. Now place a pencil box on the other side of these objects.

It was observed that in case of the glass tumbler, the pencil box on the other side can be seen clearly. In case of the coloured glass, the pencil box on the other side cannot be seen very clearly. In the third case, the pencil box is not seen at all from the other side of the wooden block.

Q. So the conclusion can be:

Olympiad Test: Light, Shadows And Reflection - 2 - Question 8

When an object is placed at the focus of a concave mirror, the image will be formed at ___________.

Detailed Solution for Olympiad Test: Light, Shadows And Reflection - 2 - Question 8
Explanation:
When an object is placed at the focus of a concave mirror, the image formed will be at infinity. This is because a concave mirror has a converging property, meaning that it brings parallel rays of light to a single point after reflection.
Here is a detailed explanation:
1. Focus of a concave mirror:
- The focus of a concave mirror is a point on its principal axis where parallel rays of light, incident on the mirror, converge after reflection.
- The focus is located halfway between the center of curvature and the mirror's surface.
2. Image formation at the focus:
- When an object is placed at the focus of a concave mirror, the reflected rays are parallel to each other.
- Since parallel rays do not converge or diverge, they do not form a real image on a screen or a surface.
- Instead, these parallel rays appear to come from a point at infinity after reflection.
3. Image characteristics:
- The image formed in this case is virtual, meaning it cannot be projected onto a screen.
- The image is also magnified compared to the object, but it appears to be located at infinity.
- The image is upright and cannot be obtained on a screen or a surface.
Therefore, when an object is placed at the focus of a concave mirror, the image will be formed at infinity.
Olympiad Test: Light, Shadows And Reflection - 2 - Question 9

The image of an object formed in the water is:

Detailed Solution for Olympiad Test: Light, Shadows And Reflection - 2 - Question 9
The image of an object formed in the water is:
There are three main characteristics of the image formed in water: inversion, magnification, and virtuality.
Inversion:
- The image formed in the water is inverted, meaning it is upside down compared to the actual object.
- This is because light rays from the object refract (bend) when they enter the water, causing the image to be flipped.
Magnification:
- The image formed in water is magnified compared to the actual object.
- This is because the speed of light is slower in water than in air, causing the light rays to bend more, resulting in a larger image.
Virtuality:
- The image formed in water is virtual, meaning it cannot be projected onto a screen.
- It is formed by the apparent intersection of the refracted rays, rather than the actual intersection of the rays.
Summary:
- The image of an object formed in water is inverted, magnified, and virtual.
- It is important to note that these characteristics apply to objects submerged in water, not objects above the water's surface.
Olympiad Test: Light, Shadows And Reflection - 2 - Question 10

Place a lamp close to a mug and observe its shadow on a table. Notice that the shadow formed has two parts. The darker part of the shadow, is the___________ and the lighter part is the ___________.

Detailed Solution for Olympiad Test: Light, Shadows And Reflection - 2 - Question 10
Explanation:
When a lamp is placed close to a mug and its shadow is observed on a table, the shadow formed consists of two parts. The darker part of the shadow is called the umbra, while the lighter part is called the penumbra.
Umbra:
- The darker part of the shadow is known as the umbra.
- It is the region where the light source is completely blocked by the object casting the shadow.
- In this case, the mug blocks the light from the lamp, creating a dark area on the table.
Penumbra:
- The lighter part of the shadow is called the penumbra.
- It is the region where the light source is only partially blocked by the object casting the shadow.
- In this case, the edges of the mug allow some light to pass through, creating a lighter area around the umbra.
Therefore, the correct answer is A: Umbra, penumbra.
49 videos|108 docs|108 tests
Information about Olympiad Test: Light, Shadows And Reflection - 2 Page
In this test you can find the Exam questions for Olympiad Test: Light, Shadows And Reflection - 2 solved & explained in the simplest way possible. Besides giving Questions and answers for Olympiad Test: Light, Shadows And Reflection - 2, EduRev gives you an ample number of Online tests for practice

Up next

49 videos|108 docs|108 tests
Download as PDF

Up next