Light Test

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Light Test - 24

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Weekly Quiz Competition

Question 1
1 / -0

How many rectangular mirrors are there in kaleidoscope which yields to pattern filling entire field?

A
$$1$$

B
$$5$$

C
$$3$$

D
$$4$$

Solution

Kaleidoscope can be either of $$2$$ or $$3$$ mirrors. $$3$$ mirrors yield a pattern that fills the entire field.
A kaleidoscope is a toy that uses light and mirrors to reflect objects and create beautiful, fascinating repeating patterns. There are many different types of kaleidoscopes that create different patterns, but all use the same basic laws of physics, manipulating light and reflection.
A two-mirror kaleidoscope yields a pattern or patterns isolated against a solid black background, while the three-mirror type yields a pattern that fills the entire field.
Question 2
1 / -0

Who invented Kaleidoscope ?

A
Sir David Brewster

B
Sir Isaac Newton

C
Albert Einstein

D
Dr. Homi Bhabha

Solution

The kaleidoscope was invented by the Scottish scientist Sir David Brewster in 1817.
Question 3
1 / -0

We should wash our eyes with:

A
water at room temperature

B
chilled water

C
warm water

D
boiling water

Solution

We should always wash our eyes with water at room temperature. Too cold or too hot water causes damage to our eyes.
Question 4
1 / -0

What is Kaleidoscope?

A
A cylinder with mirrors containing loose colored objects such as beads, pebbles, and bits of glass

B
A cylinder with mirrors

C
A cylinder containing loose colored objects such as beads, pebbles, and bits of glass

D
None of the above

Solution

$$Answer:-$$ A option
A kaleidoscope is an optical instrument, typically a cylinder with mirrors containing loose, colored objects such as beads or pebbles and bits of glass. As the viewer looks into one end, lightening the other end creates a colorful pattern, due to repeated reflection in the mirrors.
Question 5
1 / -0

What creates a colorful pattern through light entering the other end of Kaleidoscope?

A
Refraction from mirrors

B
Reflection from mirrors

C
Diffraction from mirrors

D
Deviation from mirrors

Solution

A kaleidoscope is an optical instrument, typically a cylinder with mirrors containing loose, colored objects such as beads or pebbles and bits of glass. As the viewer looks into one end, lightening the other end creates a colorful pattern, due to repeated reflection in the mirrors.
Question 6
1 / -0

Staring at computer screen for a very long time may cause

A
dry eyes

B
blurry vision

C
eye strain

D
all of these

Solution

Staring at computer screen for a very long time may cause dry eyes, blurry vision, eye strain, headache etc.
Question 7
1 / -0

Light reflecting from surface of sea rocks is an example of:

A
Regular reflection

B
Diffused reflection

C
Total internal reflection

D
None of these

Solution

When a light ray is reflected in many directions from a surface like a rock, it is called as diffused (or Irregular) reflection.
Question 8
1 / -0

Two mirrors are placed parallel and facing to each other. The size of the mirrors is different. A small object is kept in between the mirrors. How many images are formed?

A
0

B
1

C
Many but finite

D
Infinite

Solution

Parallel plane mirrors facing each other forms infinite images of an object kept in between them regardless of the size of the mirrors.
Question 9
1 / -0

What is the first and foremost step to do when you have any problems with your eyes?

A
Go to Eye Specialist

B
Expose to bright light

C
Should rub eyes

D
Wash eyes with chlorine water

Solution

Always visit an eye specialist if you have any kind of issues while viewing objects through your eyes.
Question 10
1 / -0

Modern Kaleidoscopes are made of what?

A
Brass Tubes

B
Stained Glass

C
Wood

D
All of the above

Solution

Brass tubes, stained glass, and wood all are used to make kaleidoscopes. We can also make it at home with plastic, a paper towel, and some pieces of glass, beads, and colorful items.

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Re-Attempt Weekly Quiz Competition

Light Test - 24

Result

Light Test - 24

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-

Rank

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SHARING IS CARING

Question 1

$$1$$

$$5$$

$$3$$

$$4$$

Solution

Question 2

Sir David Brewster

Sir Isaac Newton

Albert Einstein

Dr. Homi Bhabha

Solution

Question 3

water at room temperature

chilled water

warm water

boiling water

Solution

Question 4

A cylinder with mirrors containing loose colored objects such as beads, pebbles, and bits of glass

A cylinder with mirrors

A cylinder containing loose colored objects such as beads, pebbles, and bits of glass

None of the above

Solution

Question 5

Refraction from mirrors

Reflection from mirrors

Diffraction from mirrors

Deviation from mirrors

Solution

Question 6

dry eyes

blurry vision

eye strain

all of these

Solution

Question 7

Regular reflection

Diffused reflection

Total internal reflection

None of these

Solution

Question 8

0

1

Many but finite

Infinite

Solution

Question 9

Go to Eye Specialist

Expose to bright light

Should rub eyes

Wash eyes with chlorine water

Solution

Question 10

Brass Tubes

Stained Glass

Wood

All of the above

Solution

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