HUMAN EYE CLASS 10

1. HUMAN EYE

2. 1 2 3 4 5 6 7 8 9 10
a,b,d,c,
c
b,b,a,a,
b
c,c,b,b,
b
b,a,c,a,
c
a,a,c,c,
b
b b b d a
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c b c d d
THE HUMAN EYE & THE COLOURFUL WORLD
Read the following and answer any four questions from 1(i) to 1(v)
A prism is a transparent refracting medium bounded by two plane surfaces inclined to each other at a certain angle. The refraction of light through a prism fo
The incident ray suffers a deviation or bending through an angle S due to the refraction through prism. This angle is called angle of deviation as shown in figu
i + e = δ + A
•The angle between the two refracting surfaces of a prism is called
(i)angle of prism
(ii)angle of incidence
(iii)angle of deviation
(iv)angle of emergence
•The angle between the incident ray and the emergent ray is called
(i)angle ofemergence
(ii)angle of deviation
(iii)angle of incidence
(iv)none of these
•When a ray is refracted through a prism, then
(i)i = δ
(ii)i = e + δ
(iii)δ = e
(iv)i > r
•The angle of deviation depends on
(i)refractive index of prism
(ii)angle of incidence
(iii)both (a) and (b)
(iv)none of these
•The rectangular surfaces of a prism are known as
(i)reflecting surfaces
(ii)dispersing surfaces
(iii)refracting surfaces
(iv)none of these.
•The splitting of white light can be done by
(i)lens
(ii)prism
(iii)mirror
(iv)none of these
•Which property of light is used by prism to form a spectrum?
(i)Reflection
(ii)Refraction
(iii)Dispersion
(iv)Scattering
Which of the following dispersion is correct?
•When a red light passes through a prism, it
(i)will not split
(ii)will split into seven colours
(iii)will split into white colour
(iv)will split into many different colours.
•The spectrum produced by the white light by a prism is called
(i)pure spectrum
(ii)impure spectrum
(iii)monochromatic spectrum
(iv)none of these.
Read the following and answer any four questions from 3(i) to 3(v).
Light of all the colour travel at the same speed in vacuum for all wavelengths. But in any transparent medium (glass or water), the light of different colours tra
λ > λ and r < v also frequency υ = c
(i)red
(ii)blue
(iii)white
(iv)black
•At the time of sunrise and sunset, the light from sun has to travel.
(i)longest distance of atmosphere
(c) both (a) and (b)
(b) shortest distance of atmosphere
(d) can't say
•The colour of sky appears blue, it is due to the
(i)refraction of light through the atmosphere
(c) scattering of light by air molecules
(b) dispersion of light by air molecules
(d) all of these.
•At the time of sunrise and sunset
(i)Blue colour scattered and red colour reaches our eye
(ii)Red colour scattered and blue colour reaches our eye
(iii)Green and blue scattered and orange reaches our eye
(iv)None of these
•The danger signs made red in colour, because
(i)the red light can be seen from farthest distance
(ii)the scattering of red light is least
(iii)both (a) and (b)
(iv)none of these
Read the following and answer any four questions from 5(i) to 5(v).
Atmospheric refraction is the phenomenon of bending of light on passing through earth's atmosphere. As we move above the surface
•Due to atmospheric refraction, apparent length of the day
(i)increases
(ii)decreases
(iii)remains the same
(iv)all of these
•Apparent position of the star appears raised due to
(i)atmospheric refraction
(ii)scattering of light
(iii)both (a) and (b)