Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

Multiple choice physics the human eye and the colourful world human eye and its working what is inside our eyes? human eye and defects of vision

The cornea gives the colour of the eye.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The iris gives eyes their color, depending on how much melanin it contains, similar to the pigment found in skin. Also helping to determine color is the iris's front layer, or stroma, which contains melanocyte cells that produce melanin, and fibers that scatter the light reflected outward.
Hence, the statement is false.

Multiple choice physics the human eye and the colourful world human eye and its working what is inside our eyes? human eye and defects of vision

There is a pattern observed in the number of sum spots appearing every year called as

  1. solar cycle

  2. sun spot cycle

  3. solar period

  4. solar spot cycle
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sun spot cycle is a pattern observed in number of sun spots appearing every year due to revolution of earth arround sun with moon revolving earth.

Multiple choice physics the human eye and the colourful world human eye and its working what is inside our eyes? human eye and defects of vision

lens of an eye is a transparent spherical structure which :

  1. reflects light

  2. scatters light

  3. refracts light

  4. diffracts light
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The lens is a transparent structure behind the iris, the coloured part of the eye. The lens bends light rays so that they form a clear image at the back of the eye – on the retina. As the lens is elastic, it can change shape, getting fatter to focus close objects and thinner for distant objects.

Multiple choice physics the human eye and the colourful world human eye and its working what is inside our eyes? human eye and defects of vision

The screen behind the eye lens is called the :

  1. Iris

  2. Ciliary muscle

  3. Retina

  4. Pupil
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Through a process called accommodation, this lens helps the eye automatically focus on near and approaching objects, like an autofocus camera lens. Light focused by the cornea and crystalline lens (and limited by the iris and pupil) then reaches the retina — the light-sensitive inner lining of the back of the eye.

Multiple choice physics the human eye and the colourful world human eye and its working what is inside our eyes? human eye and defects of vision

The changing of focal length of an eye-lens to focus the image of an object at varying distances is done by the action of the :

  1. pupil

  2. ciliary muscles

  3. retina

  4. blind spot
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

cilliary muscles,contraction and relaxation changes the focal length of eye lens to focus the image of an object at varying distance.

Multiple choice physics the human eye and the colourful world human eye and its working what is inside our eyes? human eye and defects of vision

The cells in the retina that are able to distinguish between different colours are :

  1. Rod shaped

  2. Cone-shaped

  3. Cuboid shaped

  4. Long and flat
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cone cells, or cones, are one of three types of photoreceptor cells in the retina of mammalian eyes(e.g. the human eye). They are responsible for color vision and function best in relatively bright light.