Class 10 Practice Level 2 – The Human Eye and Colourful World – Set – 1

Total questions: 25

Which part of the eye contains the highest concentration of photoreceptor cells?

Topic: Structure of the Human Eye

Cornea

Fovea

Lens

Sclera

None

A person cannot see objects clearly beyond a distance of 1 meter. What type of lens would be required to correct this defect?

Topic: Defects of Vision

Concave lens of appropriate focal length

Convex lens of appropriate focal length

Cylindrical lens

Bifocal lens

None

Which muscle in the eye is responsible for changing the shape of the lens during accommodation?

Topic: Power of Accommodation

Ciliary muscle

Iris muscle

Rectus muscle

Oblique muscle

None

What is the angle of deviation for a monochromatic light ray passing through a prism?

Topic: Refraction of Light through a Prism

It depends on the refractive index and angle of the prism

Always 45°

Always 60°

Always 90°

None

Why do distant objects appear to shimmer on hot days?

Topic: Atmospheric Refraction

Reflection

Refraction

Dispersion

Scattering

None

Why does the path of a light beam become visible when it passes through a colloidal solution?

Topic: Tyndall Effect

Reflection

Refraction

Dispersion

Scattering

None

Why does a secondary rainbow appear fainter than the primary rainbow?

Topic: Rainbow Formation

More reflection

More refraction

More scattering

More absorption

None

Which optical instrument uses the principle of persistence of vision to display moving images?

Topic: Persistence of Vision

Microscope

Telescope

Camera

Zoetrope

None

Which type of colour blindness is most common?

Topic: Colour Blindness

Red-green colour blindness

Blue-yellow colour blindness

Total colour blindness

Partial colour blindness

None

10.

What is the role of the aqueous humour in the eye?

Topic: Structure of the Human Eye

Protects the retina

Maintains intraocular pressure

Controls the amount of light entering the eye

Focuses light on the retina

None

11.

Which defect of vision is associated with an irregularly shaped cornea?

Topic: Defects of Vision

Myopia

Hypermetropia

Astigmatism

Presbyopia

None

12.

Why does the power of accommodation decrease with age?

Topic: Power of Accommodation

The cornea becomes less flexible

The iris becomes less responsive

The ciliary muscles weaken

The lens becomes less flexible

None

13.

Which colour of light is refracted the most when passing through a prism?

Topic: Dispersion of Light

Red

Orange

Yellow

Violet

None

14.

What causes the apparent bending of the Sun's rays near the horizon?

Topic: Atmospheric Refraction

Reflection

Refraction

Dispersion

Scattering

None

15.

How does the Tyndall Effect help in distinguishing between a true solution and a colloidal solution?

Topic: Tyndall Effect

True solutions scatter light

Colloidal solutions scatter light

Both scatter light equally

Neither scatter light

None

16.

In which order do the colours appear in a primary rainbow from the top to the bottom?

Topic: Rainbow Formation

Violet, Blue, Green, Yellow, Orange, Red

Red, Orange, Yellow, Green, Blue, Violet

Blue, Green, Yellow, Orange, Red, Violet

Orange, Yellow, Red, Blue, Green, and Violet

None

17.

What is the minimum frame rate required to perceive continuous motion in a film?

Topic: Persistence of Vision

10 frames per second

16 frames per second

24 frames per second

30 frames per second

None

18.

Which type of cells in the retina are primarily responsible for detecting colour?

Topic: Colour Blindness

Rods

Cones

Ganglion cells

Bipolar cells

None

19.

What is the main function of the iris in the human eye?

Topic: Structure of the Human Eye

Focusing light on the retina

Controlling the amount of light entering the eye

Providing nutrients to the eye

Maintaining eye shape

None

20.

What is the focal length of a concave lens required to correct myopia for a person who cannot see beyond 2 meters?

Topic: Defects of Vision

-1 m

-2 m

-0.5 m

-0.25 m

None

21.

How does the eye focus on a close object?

Topic: Power of Accommodation

The lens becomes thinner

The lens becomes thicker

The cornea changes shape

The retina moves forward

None

22.

Why does dispersion of light occur when it passes through a prism?

Topic: Dispersion of Light

Different colours of light have different speeds in the prism material

All colours of light have the same speed in the prism material

The prism absorbs certain colours

The prism reflects certain colours

None

23.

What is the phenomenon that causes the apparent shift in the position of stars when observed from Earth?

Topic: Atmospheric Refraction

Reflection

Refraction

Dispersion

Scattering

None

24.

Which of the following solutions will exhibit the Tyndall Effect?

Topic: Tyndall Effect

Sugar solution

Salt solution

Milk

Alcohol solution

None

25.

What causes the formation of a double rainbow?

Topic: Rainbow Formation

Single internal reflection of light in raindrops

Double internal reflection of light in raindrops

Refraction and reflection of light in dust particles

Scattering of light in the atmosphere

None

1 out of 25

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Class 10 Practice Level 2 – The Human Eye and Colourful World – Set – 1

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