Light Test

Result

Light Test - 23

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Which of the following is used for any person who is suffering from minor eye defect or for a partly blind person?

A
Electronic aids

B
Auditory aids

C
Non-optical aids

D
Optical aids

Solution

Optical aids are used for any person who is suffering from a minor eye defect or for a partly blind person to help them see better. It includes corrective glasses, bifocal lenses, coloured lenses etc.
Question 2
1 / -0

Braille is a ________ language based on _______ system.

A
binary, binary

B
coded, logical

C
binary, coded

D
logical, binary

Solution

Braille is a system of touch reading and writing for blind persons in which raised dots to represent the letters of the alphabet. So you can say, it is coded language based on a logical system.
Question 3
1 / -0

In our eyes, too much exposure to ultraviolet rays causes:

A
cataracts

B
muscular degeneration

C
both A and B

D
neither A nor B

Solution

Long-term exposure to even small amounts of UV radiation can increase your risk of developing a cataract or muscular degeneration. UV exposure adds up over time. Long-term UV exposure can also causes tissue elevations on the surface of your eye.
Question 4
1 / -0

Do you know many visually challenged persons had great achievements to their credits.Can you identify the one who represented India on Braille problems in UNESCO

A
Manjunath V

B
Maria Runyan

C
Lal Advani

D
Ravinder Jain

Solution

Lal Advani himself visually challenged,established an Association for special education and rehabilitation of disabled in India.He also represented India on Braille problems in UNESCO.
Question 5
1 / -0

Read the statements and mark the correct one(s)
i. Braille cells are read from left to right.
ii. Each Braille character is made up of six dots.
iii. Braille can only be produced manually.

A
i and ii

B
ii and iii

C
i and iii

D
All are true
Solution
- Braille cells are read from left to right, regardless of the language they are used to encode.
- Each Braille character is made up of six dots, arranged in matrix of dots. Dots are arranged in cells of two vertical rows of three dots each.
- Braille texts can be produced by hand or by machine. Typewriter-like devices and printing machines have now been developed.
So only statements $$(i)$$ and $$(ii)$$ are correct. Option $$A$$ is the answer.
Question 6
1 / -0

Apparatus required to prove the laws of reflection:

A
A spherical mirror

B
A plane mirror, a laser light, a pencil, a protactor

C
A mirror with black paper

D
A ray of light

Solution

To prove the laws of reflection, a ray of laser light is allowed to strike the plane mirror and the light is reflected back. With a pencil, mark the path of the light and the mirror's base. With a protractor, measure the angle of incidence and the angle of reflection and it is found that:
$$\text {Angle of incidence} = \text {Angle of reflection}$$
Question 7
1 / -0

Choose the proper food from following, to keep our eyes healthy:

A
Green leafy vegetables

B
Fish

C
Orange

D
All of these

Solution

Food like green leafy vegetables, fish, oranges etc have the proper nutrients(Vitamins A,C and E) which are good for our eyes.
Question 8
1 / -0

Shall a kaleidoscope work in a dark room?

A
Yes

B
No

C
Sometimes

D
Can't say

Solution

A kaleidoscope works on the principle of multiple reflections. In order to make the reflections occur, light enters a kaleidoscope through a hole. In a dark room, no light is present. So, no light will enter the kaleidoscope and no reflections will be seen. So, a kaleidoscope will not work in a dark room.
Question 9
1 / -0

Polaroid glasses protect our eyes from:

A
ultraviolet rays

B
cold

C
heat

D
dryness

Solution

Polaroid glasses protect our eyes from ultraviolet rays.
Question 10
1 / -0

Why there are two parallel plane mirrors in a barber shop?

A
Two parallel plane mirrors form infinite images.

B
The customer can see the image of back of his head with the help of this setup.

C
The setup focusses light and helps the barber to cut the hair better.

D
None of the above.

Solution

Let man be facing mirror 1 in front and mirror 2 in back. Infinite images of both front and back are formed in both the mirrors. Hence, he can see the back of his head in the mirror.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Light Test - 23

Result

Light Test - 23

Score

-

Rank

-

SHARING IS CARING

Question 1

Electronic aids

Auditory aids

Non-optical aids

Optical aids

Solution

Question 2

binary, binary

coded, logical

binary, coded

logical, binary

Solution

Question 3

cataracts

muscular degeneration

both A and B

neither A nor B

Solution

Question 4

Manjunath V

Maria Runyan

Lal Advani

Ravinder Jain

Solution

Question 5

i and ii

ii and iii

i and iii

All are true

Solution

Question 6

A spherical mirror

A plane mirror, a laser light, a pencil, a protactor

A mirror with black paper

A ray of light

Solution

Question 7

Green leafy vegetables

Fish

Orange

All of these

Solution

Question 8

Yes

No

Sometimes

Can't say

Solution

Question 9

ultraviolet rays

cold

heat

dryness

Solution

Question 10

Two parallel plane mirrors form infinite images.

The customer can see the image of back of his head with the help of this setup.

The setup focusses light and helps the barber to cut the hair better.

None of the above.

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.