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Human Eye and Colourful World Class 10 MCQs Questions with Answers
Question 1.
Image formed on retina in human eye is:
(a) erect but looks inverted
(b) inverted but looks erect
(c) erect and looks also erect
(d) inverted and looks also inverted.
Answer:
(b) inverted but looks erect
Question 2.
Human eye is formed image on:
(a) cornea
(b) iris
(c) pupil
(d) retina
Answer:
(d) retina
Question 3.
The amount of light entering in eye is controlled by:
(a) Iris
(b) Pupil
(c) Ciliary muscle
(d) Suspensory ligaments.
Answer:
(b) Pupil
Question 4.
Far point of a man suffering from short-sightedness is:
(a) at 25 cm
(b) at less than 25 cm
(c) at infinity
(d) at less than infinity.
Answer:
(b) at less than 25 cm
Question 5.
Image formed in normal eye of human is:
(a) on retina
(b) beyond retina
(c) behind retina
(d) at infinity.
Answer:
(a) on retina
Question 6.
Far point for human eye is at:
(a) 25 cm
(b) 50 cm
(c) 100 cm
(d) infinity
Answer:
(d) infinity
Question 7.
Minimum distance of clear vision is:
(a) 25 cm
(b) 2.5 cm
(c) 25 cm
(d) 2.5 cm
Answer:
(c) 25 cm
Question 8.
The defect of long-sightedness is cured by:
(a) concave lens of definite focal length
(b) convex lens of definite focal length
(c) convex lens of any focal length
(d) concave lens of any focal length.
Answer:
(b) convex lens of definite focal length
Question 9.
Eye lens is:
(a) converging
(b) diverging
(c) convex and concave
(d) none of these
Answer:
(a) converging
Question 10.
A person suffering from long-sightedness uses a lens in spectacles is:
(a) concave lens
(b) concave mirror
(c) convex lens
(d) convex mirror
Answer:
(c) convex lens
Question 11.
A person suffering from short-sightedness uses a lens in spectacles is:
(a) concave lens
(b) concave mirror
(c) convex lens
(d) convex mirror
Answer:
(a) concave lens
Question 12.
Near point of a man, which is suffering from defect of long sightedness, is:
(a) at 25 cm
(b) at less than 25 cm
(c) at greater than 25 cm
(d) at infinite
Answer:
(c) at greater than 25 cm
Question 13.
Due to long-sightedness, the image is formed:
(a) at retina
(b) beyond retina
(c) behind retina
(d) indefinite
Answer:
(c) behind retina
Question 14.
A person uses a convex lens of focal length 20 cm in spectacles, the power of lens will be:
(a) -5 D
(b) +5 D
(c) +2 D
(d) -2 D
Answer:
(b) +5 D
Question 15.
Perception of colours by human eye is possible:
(a) at retina
(b) by rod shaped cells of retina
(c) cone shaped cells of retina
(d) by yellow spot.
Answer:
(c) cone shaped cells of retina
Question 16.
The animal which does not have eyes that look sideways is:
(a) Horse
(b) Chicken
(c) Lion
(d) Fish
Answer:
(c) Lion
Question 17.
With both eyes open, a person’s field of view is about:
(a) 90°
(b) 150°
(c) 180°
(d) 360°
Answer:
(c) 180°
Question 18.
Having two eyes gives a person:
(a) deeper field of view
(b) coloured field of view
(c) rear field of view
(d) wider field of view
Answer:
(d) wider field of view
Question 19.
The animals of prey have:
(a) two eyes at the front
(b) two eyes at the back
(c) two eyes on the sides
(d) one eye at the front and one on the side
Answer:
(c) two eyes on the sides
Question 20.
The animals called predators have:
(a) both the eyes on the sides
(b) one eye on the side and one at the front
(c) one eye on the front and one at the back
(d) both the eyes at the front
Answer:
(d) both the eyes at the front
Question 21.
The splitting up of white light into seven colours on passing through a glass prism is called:
(a) refraction
(b) deflection
(c) dispersion
(d) scattering
Answer:
(c) dispersion
Question 22.
Which of the following colour of white light has the least wavelength?
(a) red
(b) orange
(c) violet
(d) blue
Answer:
(c) violet
Question 23.
Which of the following colour of white light has the maximum wavelength?
(a) red
(b) orange
(c) violet
(d) blue
Answer:
(a) red
Question 24.
The twinkling of stars is due to atmosphere:
(a) reflection of light
(b) dispersion of light
(c) interference of light
(d) refraction of light
Answer:
(d) refraction of light
Question 25.
The atmospheric refraction of light causes the twinkling of:
(a) planets only
(b) stars only
(c) planets and stars
(d) stars and satellites
Answer:
(b) stars only
Question 26.
Due to atmospheric refraction of sunlight, the time from sunrise to sunset is lengthened by about:
(a) 6 minutes
(b) 2 minutes
(c) 4 minutes
(d) 5 minutes
Answer:
(c) 4 minutes
Question 27.
The blue colour of sky is due to:
(a) refraction of light
(b) dispersion of light
(c) diffraction of light
(d) scattering of light
Answer:
(d) scattering of light
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