Human eye

The muscular diaphragm that controls the size of the pupil is ---------------

• cornea

• ciliary muscles

• Iris

• retina

Having two eyes facilitates in

A : Increasing the field of view

B : Bringing three-dimensional view

C : Developing the concept of distance/ size Then the correct option is/are

• A only

• A and B only

• B only

• A, B and C

Tags

NGSS.MS-LS1-8

The black opening between the aqueous humour and the lens is called --------------

• retina

• iris

• cornea

• pupil

Near and far points of a young person normal eye respectively are---------

• 0 and infinity

• 0 and 25 cm

• 25 cm and infinity

• 25 cm and 150 cm.

The defect of vision in which the person is able to see distant object distinctly but cannot see nearby objects clearly is called --------------

• Long-sightedness

• Far-sightedness

• Hypermetropia

• All above

The ability of eye lens to adjust its focal length to form a sharp image of the object at varying distances on the retina is called -------------

• Power of observation of the eye

• Power of adjustment of the eye

• Power of accommodation of the eye

• Power of enabling of the eye

The image formed on the retina of the human eye is ----------------

• virtual and inverted

• real and inverted

• real and erect

• virtual and erect

When white light enters a prism, it gets split into its constituent colours. This is due to _____________________

• different refractive index for different wavelength of each colour

• each colours has same velocity in the prism.

• prism material have high density.

• Scattering of light

The air layer of atmosphere whose temperature is less then the hot layer behave as optically

• denser medium

• rarer medium

• inactive medium

• either denser or rarer medium

Refraction of light by the earth’s atmosphere due to variation in air density is called -------------

• atmospheric reflection

• atmospheric dispersion

• atmospheric scattering

• atmospheric refraction

Tags

NGSS.HS-PS4-3