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Did you know the average porcupine has 30,000 spikes.

The art of being wise is the art of knowing what to overlook.– William James

Class X >> Science >> Human Eye and Colourful World >> A1

Q1	The least distance of distinct vision for a young adult with normal vision is about:
A	50 cm
B	100 cm
C	25 cm
D	5 cm

Q2	The phenomenon of light responsible for the working of human eye is __________.
A	Reflection
B	Refraction
C	Converging Power
D	Power of Accommodation

Q3	The part of eye sensitive to light is __________.
A	Iris
B	Retina
C	Cornea
D	Pupil

Q4	Power of lens is expressed in:
A	Cm
B	Gram
C	Dioptres
D	Newton

Q5	The image formed by retina of human eye is __________.
A	Virtual and Real
B	Real and Inverted
C	Real and Erect
D	Virtual and Inverted

Q6	The ciliary muscles control the shape of the __________.
A	Pupil
B	Eye Lens
C	Cornea
D	Optic Nerve

Q7	The change in the focal length of human eye is caused due to __________.
A	Ciliary Muscles
B	Optic Nerve
C	Eye Lens
D	Retina

Q8	The primary basic colours are:
A	Red, Blue, Yellow
B	Red, Green, Blue
C	Red, Green, Yellow
D	Red, Yellow, Orange

Q9	The angle between incident ray and emergent ray is called __________.
A	Angle of Prism
B	Angle of Incidence
C	Angle of Deviation
D	Angle of Emergence

Q10	The human eye forms the image of an object at its:
A	Cornea
B	Iris
C	Ciliary Muscles
D	Retina

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