Read the passage carefully and answer the following questions from (i) to (v):
Binoculars, like telescopes, produce magnified images of far away objects. Figure shows a typical binocular design. Each side of the binoculars is like a small telescope: light enters a convex objective lens, which inverts the image. The light then travels through two prisms that are used to completely reflect the incoming ray to invert the image again, so that the viewer sees an image that is upright compared to the object.
(i) Binocular is basically a:
microscope
telescope
dispersion device
magnifying glass
(2)
Read the passage carefully and answer the following questions from (i) to (v):
Binoculars, like telescopes, produce magnified images of far away objects. Figure shows a typical binocular design. Each side of the binoculars is like a small telescope: light enters a convex objective lens, which inverts the image. The light then travels through two prisms that are used to completely reflect the incoming ray to invert the image again, so that the viewer sees an image that is upright compared to the object.
(ii) Prisms are used in binoculars:
for reflection
for refraction
for dispersion
for total internal reflection
(4)
Read the passage carefully and answer the following questions from (i) to (v):
Binoculars, like telescopes, produce magnified images of far away objects. Figure shows a typical binocular design. Each side of the binoculars is like a small telescope: light enters a convex objective lens, which inverts the image. The light then travels through two prisms that are used to completely reflect the incoming ray to invert the image again, so that the viewer sees an image that is upright compared to the object.
(iii) Binoculars are used to see:
near objects
far objects
both near and far objects
none of the above
(2)
Read the passage carefully and answer the following questions from (i) to (v):
Binoculars, like telescopes, produce magnified images of far away objects. Figure shows a typical binocular design. Each side of the binoculars is like a small telescope: light enters a convex objective lens, which inverts the image. The light then travels through two prisms that are used to completely reflect the incoming ray to invert the image again, so that the viewer sees an image that is upright compared to the object.
(iv) Refractive index of air is:
1.00
0.5
1.5
2.0
(1)
Read the passage carefully and answer the following questions from (i) to (v):
Binoculars, like telescopes, produce magnified images of far away objects. Figure shows a typical binocular design. Each side of the binoculars is like a small telescope: light enters a convex objective lens, which inverts the image. The light then travels through two prisms that are used to completely reflect the incoming ray to invert the image again, so that the viewer sees an image that is upright compared to the object.
(v) The lens facing object in binocular is called:
object lens
objective lens
intermediate lens
eye lens
(2)
Read the passage carefully and answer the following questions from (i) to (v).
Light is a form of energy that produces in the sensation of sight. Reflection of light is the phenomenon of bouncing back of light in the same medium on striking the surface of any object.
The two laws of reflection are the incident ray, the reflected ray and the normal (at the point of incidence), all lie in the same plane and the angle of reflection (r) is always equal to the angle of incidence (i). Refraction of light is the phenomenon of change in the path of light in going from one medium to another.
(i) Mirage is caused due to:
total Internal Reflection of light by the various layers of air
illusion of the presence of water
result of refraction of light from a non uniform medium
during sunny days when driving on a roadway
(1)
Read the passage carefully and answer the following questions from (i) to (v).
Light is a form of energy that produces in the sensation of sight. Reflection of light is the phenomenon of bouncing back of light in the same medium on striking the surface of any object.
The two laws of reflection are the incident ray, the reflected ray and the normal (at the point of incidence), all lie in the same plane and the angle of reflection (r) is always equal to the angle of incidence (i). Refraction of light is the phenomenon of change in the path of light in going from one medium to another.
(ii) What is mirage?
Depends on the position of object
Mirror is concave and the lens is convex
Goes straight into the second medium
Optical illusion caused due to Total Internal Reflection
(4)
Read the passage carefully and answer the following questions from (i) to (v).
Light is a form of energy that produces in the sensation of sight. Reflection of light is the phenomenon of bouncing back of light in the same medium on striking the surface of any object.
The two laws of reflection are the incident ray, the reflected ray and the normal (at the point of incidence), all lie in the same plane and the angle of reflection (r) is always equal to the angle of incidence (i). Refraction of light is the phenomenon of change in the path of light in going from one medium to another.
(iii) What are the two types of mirage?
Thin mirage and thick mirage
Inferior mirage and superior mirage
Intense mirage and diminished mirage
Light mirage and dark mirage
(2)
Read the passage carefully and answer the following questions from (i) to (v).
Light is a form of energy that produces in the sensation of sight. Reflection of light is the phenomenon of bouncing back of light in the same medium on striking the surface of any object.
The two laws of reflection are the incident ray, the reflected ray and the normal (at the point of incidence), all lie in the same plane and the angle of reflection (r) is always equal to the angle of incidence (i). Refraction of light is the phenomenon of change in the path of light in going from one medium to another.
(iv) How a mirage is formed?
Between focus and centre of curvature
Is formed away from the normal
Illusion of the presence of water and is a result of refraction of light from a non-uniform medium
Is reflected along the same path
(3)
Read the passage carefully and answer the following questions from (i) to (v).
Light is a form of energy that produces in the sensation of sight. Reflection of light is the phenomenon of bouncing back of light in the same medium on striking the surface of any object.
The two laws of reflection are the incident ray, the reflected ray and the normal (at the point of incidence), all lie in the same plane and the angle of reflection (r) is always equal to the angle of incidence (i). Refraction of light is the phenomenon of change in the path of light in going from one medium to another.
(v) Mirage is observed mainly during _______ days.
Sunny
Winter
Spring
Hot
(1)
