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The Human Eye and the Colourful World

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Functioning of a lens in human eye

Subtopic

Functioning of a lens in human eye under The Human Eye and the Colourful World for Grade 10 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The lens in the human eye is biconvex. This means it is:

    A.

    Thick in the middle and thin at the edges

    B.

    Thin in the middle and thick at the edges

    C.

    Flat on one side and curved on the other

    D.

    Curved inward on both sides

  2. 2.

    For a normal eye, the lens has the least focal length when looking at an object at a distance of:

    A.

    5 cm5\text{ cm}

    B.

    25 cm25\text{ cm}

    C.

    100 cm100\text{ cm}

    D.

    Infinity

  3. 3.

    The lens becomes less curved when the ciliary muscles are:

    A.

    Relaxed

    B.

    Contracted

    C.

    Strained

    D.

    Tensed

Download the worksheet for The Human Eye and the Colourful World - Functioning of a lens in human eye to practice offline. It includes additional chapter-level practice questions.

Defects of vision and their corrections

Subtopic

Defects of vision and their corrections under The Human Eye and the Colourful World for Grade 10 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The horizontal field of view with two eyes open is about:

    A.

    150∘150^{\circ}

    B.

    180∘180^{\circ}

    C.

    120∘120^{\circ}

    D.

    210∘210^{\circ}

  2. 2.

    The horizontal field of view with one eye open is about:

    A.

    150∘150^{\circ}

    B.

    180∘180^{\circ}

    C.

    90∘90^{\circ}

    D.

    360∘360^{\circ}

  3. 3.

    A person using a lens of power +2.0 D+2.0 \text{ D} is correcting for:

    A.

    Nearsightedness

    B.

    Farsightedness

    C.

    Cataract

    D.

    Blindness

Download the worksheet for The Human Eye and the Colourful World - Defects of vision and their corrections to practice offline. It includes additional chapter-level practice questions.

Refraction of light through a prism

Subtopic

Refraction of light through a prism under The Human Eye and the Colourful World for Grade 10 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    When white light is incident on a prism, it splits because:

    A.

    The prism is colored

    B.

    Each color has a different frequency but same speed

    C.

    Different colors have different speeds in the glass

    D.

    The prism is triangular

  2. 2.

    The speed of light in vacuum is 3×1083 \times 10^8 m/s. In glass, the speed of violet light is:

    A.

    More than the speed of red light

    B.

    Less than the speed of red light

    C.

    Equal to the speed of red light

    D.

    Exactly 3×1083 \times 10^8 m/s

  3. 3.

    What is the reason why we see a rainbow in the sky?

    A.

    Light reflection from clouds

    B.

    Light dispersion by water droplets

    C.

    Light absorption by air

    D.

    Light pollution

Download the worksheet for The Human Eye and the Colourful World - Refraction of light through a prism to practice offline. It includes additional chapter-level practice questions.

Dispersion of light

Subtopic

Dispersion of light under The Human Eye and the Colourful World for Grade 10 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In the VIBGYOR acronym, the letter 'O' stands for which color?

    A.

    Olive

    B.

    Ochre

    C.

    Orange

    D.

    Opal

  2. 2.

    How many times does a ray of light undergo refraction while passing through a single glass prism?

    A.

    One

    B.

    Two

    C.

    Three

    D.

    Zero

  3. 3.

    Which color of light corresponds to the highest refractive index of glass?

    A.

    Red

    B.

    Green

    C.

    Yellow

    D.

    Violet

Download the worksheet for The Human Eye and the Colourful World - Dispersion of light to practice offline. It includes additional chapter-level practice questions.

Scattering of light

Subtopic

Scattering of light under The Human Eye and the Colourful World for Grade 10 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The path of a beam of light through a true solution is:

    A.

    Visible

    B.

    Invisible

    C.

    Colored blue

    D.

    Colored red

  2. 2.

    What type of mixture is fog?

    A.

    True solution

    B.

    Colloid

    C.

    Compound

    D.

    Pure substance

  3. 3.

    Which of these contributes to the blue color of the ocean?

    A.

    Reflection of the blue sky

    B.

    Scattering of light by water molecules

    C.

    Both A and B

    D.

    The color of the sand at the bottom

Download the worksheet for The Human Eye and the Colourful World - Scattering of light to practice offline. It includes additional chapter-level practice questions.

Atmospheric refraction

Subtopic

Atmospheric refraction under The Human Eye and the Colourful World for Grade 10 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    At which position does the Sun suffer the least amount of atmospheric refraction?

    A.

    Just at sunrise

    B.

    Just at sunset

    C.

    Directly overhead at noon

    D.

    Early morning

  2. 2.

    Planets appear as large discs compared to stars because they are:

    A.

    Bigger in actual size

    B.

    Much closer to the Earth

    C.

    Hotter than stars

    D.

    Colder than stars

  3. 3.

    The bending of starlight as it enters the Earth's atmosphere is an example of:

    A.

    Internal refraction

    B.

    Atmospheric refraction

    C.

    Planetary reflection

    D.

    Solar scattering

Download the worksheet for The Human Eye and the Colourful World - Atmospheric refraction to practice offline. It includes additional chapter-level practice questions.

The Human Eye and the Colourful World - Class 10 Science (CBSE) | Krit.club