Trait B is likely to have arisen earlier because this trait has been replicating and existing in a higher percentage of the population as compared to trait A.
Trait B is likely to have arisen earlier because this trait has been replicating and existing in a higher percentage of the population as compared to trait A.
We prefer a convex mirror as a rear-view mirror in vehicles because of two reasons - 1. A convex mirror always produces an erect image of the objects. 2. The image formed in a convex mirror is highly diminished or much smaller than the object, due to which a convex mirror gives a wide field of view.
We prefer a convex mirror as a rear-view mirror in vehicles because of two reasons –
1. A convex mirror always produces an erect image of the objects.
2. The image formed in a
convex mirror is highly diminished or much smaller than the object, due to which a convex
mirror gives a wide field of view.
The principal focus of a concave mirror is a point on its principal axis to which all the light rays which are parallel and close to the axis, converge after reflection from the concave mirror.
The principal focus of a concave mirror is a point on its principal axis to which all the
light rays which are parallel and close to the axis, converge after reflection from the concave mirror.
For a normal human eye, this distance is 25 cm. The far point of the eye is the maximum distance to which the eye can see the objects clearly. The far point of the normal human eye is infinity.
For a normal human eye, this distance is 25 cm. The far point of the eye is the maximum distance to which the eye can see the objects clearly. The far point of the normal human eye is infinity.
The person is able to see nearby objects clearly, but he is unable to see objects beyond 1.2 m because the image formed in front of the retina. To correct this defect of vision, he must use a concave lens. The concave lens will bring the image back to the retina.
The person is able to see nearby objects clearly, but he is unable to see objects beyond
1.2 m because the image formed in front of the
retina.
To correct this defect of vision, he must use a concave lens. The concave lens will bring
the image back to the retina.
If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?
Trait B is likely to have arisen earlier because this trait has been replicating and existing in a higher percentage of the population as compared to trait A.
Trait B is likely to have arisen earlier because this trait has been replicating and existing in a higher percentage of the population as compared to trait A.
See lessA concave mirror produces three times magnified (enlarged) real image of an object placed at 10 cm in front of it. Where is the image located?
m = − v/u= −3 or v = 3u But u = -10 ∴ v = −30cm.
m = − v/u= −3 or v = 3u
See lessBut u = -10
∴ v = −30cm.
Find the focal length of a convex mirror whose radius of curvature is 32 cm.
R = +32cm and f = R/2= + 32/2= +16cm.
R = +32cm and f = R/2= + 32/2= +16cm.
See lessWhy do we prefer a convex mirror as a rear-view mirror in vehicles?
We prefer a convex mirror as a rear-view mirror in vehicles because of two reasons - 1. A convex mirror always produces an erect image of the objects. 2. The image formed in a convex mirror is highly diminished or much smaller than the object, due to which a convex mirror gives a wide field of view.
We prefer a convex mirror as a rear-view mirror in vehicles because of two reasons –
1. A convex mirror always produces an erect image of the objects.
2. The image formed in a
See lessconvex mirror is highly diminished or much smaller than the object, due to which a convex
mirror gives a wide field of view.
Name a mirror that can give an erect and enlarged image of an object.
Concave mirror.
Concave mirror.
See lessThe radius of curvature of a spherical mirror is 20 cm. What is its focal length?
Focal length = 2 x Radius of curvature = 2 x 20 cm = 10 cm
Focal length = 2 x Radius of curvature = 2 x 20 cm = 10 cm
See lessDefine the principal focus of a concave mirror.
The principal focus of a concave mirror is a point on its principal axis to which all the light rays which are parallel and close to the axis, converge after reflection from the concave mirror.
The principal focus of a concave mirror is a point on its principal axis to which all the
See lesslight rays which are parallel and close to the axis, converge after reflection from the concave mirror.
A student has difficulty reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be corrected?
The child is suffering from myopia. This defect can be corrected by using a concave lens of suitable focal length.
The child is suffering from myopia. This defect
See lesscan be corrected by using a concave lens of suitable focal length.
What is the far point and near point of the human eye with normal vision?
For a normal human eye, this distance is 25 cm. The far point of the eye is the maximum distance to which the eye can see the objects clearly. The far point of the normal human eye is infinity.
For a normal human eye, this distance is 25 cm. The far point of the eye is the maximum distance to which the eye can see the objects clearly. The far point of the normal human eye is infinity.
See lessA person with a myopic eye cannot see objects beyond 1.2 m distinctly. What should be the type of the corrective lens used to restore proper vision?
The person is able to see nearby objects clearly, but he is unable to see objects beyond 1.2 m because the image formed in front of the retina. To correct this defect of vision, he must use a concave lens. The concave lens will bring the image back to the retina.
The person is able to see nearby objects clearly, but he is unable to see objects beyond
See less1.2 m because the image formed in front of the
retina.
To correct this defect of vision, he must use a concave lens. The concave lens will bring
the image back to the retina.