CURIOUSITY QUIZ : LIGHT

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Test Your knowledge on 'Light' prepared exclusively according to the NCERT science curriculum for Class-8 . Attempt all the questions by clicking on the right option. Submit the completed Form by clicking the 'Submit' button at the end of the Form. Get your Score and the correct Answer by clicking the 'View score' button. Good Luck!

Name

School with Address (if Student)

Class (if Student)

Address (if not Student)

How many images are seen of an object when it is kept between two parallel plane mirrors?

1 point

Infinite

Clear selection

What is the name of the device used in a submarine to view objects on the surface of the sea water ?

1 point

Binocular

Telescope

Periscope

Kaleidoscope

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What is the nature of the image formed in a plane mirror?

1 point

Real, Erect and Magnified

Virtual, Inverted , Diminished

Virtual, Erect , Diminished

Virtual, Erect , Same size as that of the object

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Which property of light is responsible for the generation of beautiful patterns seen in a kaleidoscope?

1 point

Reflection

Refraction

Lateral Inversion

Multiple Reflection

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A small opening entering our eyes by contracting and expanding its aperture is called :

1 point

Cornea

Iris

Pupil

Eye Lens

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What is the name of the photo-receptor cells present in the retina of our eyes that allow us colour vision ?

1 point

Rods

Cones

Both Rods and Cones

None of the above

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How much time does the impression of an object persists in our brain ?

1 point

1/12 seconds

1/16 seconds

1/14 seconds

1/24 seconds

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Older people often suffer from a defect which is generally accompanied by the clouding of vision. This is due to :

1 point

Spherical nature of the eye lens with age

Cylindrical nature of the eye lens with age

Weakening of optical nerves with age

Opacity of the eye lens

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What is the Least distance of distinct vision of a normal human eye? What is the maximum distance to which the eye can theoretically see the objects clearly (Far point)?

1 point

25 cm, 1m ( respectively)

25 cm, Infinity respectively)

15 cm, Infinity respectively)

10 cm, Infinity respectively)

Clear selection

Which of the following statements is true for light ?

1 point

Light itself is visible, it also makes things visible for us by the process of reflection.

Light itself is visible, it also makes things visible for us by the process of refraction.

Light is invisible, but it makes things visible for us by the process of reflection.

Light is invisible, but it makes things visible for us by the process of refraction.

Clear selection

The splitting of white light to its constituent colours by a prism is called:

1 point

Diffraction

Total Internal Reflection

Refraction

Dispersion

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When a beam of parallel rays of light is incident on a rough surface , the reflected rays are not necessarily parallel. This type of reflection is generally called Irregular Reflection. What is the other name for it?

1 point

Rough Reflection

Unparallel Reflection

Oblique Reflection

Diffused Reflection

Clear selection

What is the nature of image formed by a Plane mirror?

1 point

Virtual, Erect and Diminished in size

Virtual, Inverted and Same size as that of the object

Real, Erect and Same size as that of the object

Virtual, Erect and Same size as that of the object

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The coloured muscular part of the eye surrounding the Pupil whose muscles control the the diameter of the Pupil is called:

1 point

Retina

Cones

Cornea

Iris

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Which part of the Eye gives a distinctive colour to the eye ?

1 point

Retina

Cones

Cornea

Iris

Clear selection

Which part of the Eye is donated to a patient in an eye donation?

1 point

Retina

Cones

Cornea

Iris

Clear selection

Muscles found in the Eye lens that changes the shape of the Eye lens when we focus on nearby objects:

1 point

Thoracic muscles

Iris muscles

Optic nerves

Ciliary muscles

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The older people generally suffer from a disease that is accompanied by a clouding (or opacity) of the eye lens:

1 point

Preshybia

Myopia

Cataract

Glaucoma

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Which phenomena of light is responsible for the formation of Rainbow?

1 point

Reflection

Refraction

Dispersion

scattering

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What transmits the sensation of image formed in the Retina of our eyes to the brain by electro-chemical signals?

1 point

Rods and Cone cells present in the Retina

Iris

Cilliary muscles

Optic Nerves

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The image that can be projected on a Screen is called :

1 point

True image

Projected image

Virtual image

Real image

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What is the relationship between the Object Distance and the Image Distance for a Plane mirror ?

1 point

Object Distance is more than the Image Distance.

Object Distance is less than the Image Distance.

Object Distance is equal to the Image Distance.

Can't be said in definite terms.

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Sources that emit light of their own are called :

1 point

Real Sources

True Sources

Luminous Sources

Lighted Sources

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When a ray of light is incident perpendicularly on a Plane mirror, what is the Angle of Reflection ?

1 point

90 degree

180 degree

0 degree

Can't be said

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Pl write your suggestions on the content of the quiz which will be required for further improvement of the quiz

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