Which lenses are used by people having short-sightedness? A. Convex B. Concave (Answer) C. Concavo-convex D. Plain

Which lenses are used by people having short-sightedness?

A. Convex

B. Concave (Answer)

C. Concavo-convex

D. Plain
by

1 Answer

Answer :

B. Concave (Answer)
by

Related questions

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Last Answer : B. Concave lens (Answer)

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Description : Which lenses are used by people having short-sightedness?

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Ramsden eye-piece consists of (A) Two convex lenses short distance apart (B) Two concave lenses short distance apart (C) One convex lens and one concave lens short distance apart (D) Two Plano-convex lenses short distance apart, with the convex surfaces facing each other

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Last Answer : (C) 30 cm 

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Long-sight defect could be corrected by using ----- lens? A. concave B. Convex (Answer) C. diverging D. none of these

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Differentiate Short-sightedness and Long-sightedness. -SST 10th

Description : Differentiate Short-sightedness and Long-sightedness. -SST 10th

Last Answer : ' Short-sightedness and Long-sightedness Short-SightednessLong-Sightedness(i) The inability of the eye lens to focus images of distant objects on the retina; so the images fall in front of the retina ... is corrected by using glasses of concave lens.It is corrected by using glasses of convex lens.

Why does happen Short sightedness? -Do You Know?

Description : Why does happen Short sightedness? -Do You Know?

Last Answer : answer:

Why does happen Short sightedness?

Description : Why does happen Short sightedness?

Last Answer : Due to elongation of eye balls

Define short-sightedness and long-sightedness.

Description : Define short-sightedness and long-sightedness.

Last Answer : In short-sightedness a person can see near objects clearly but distant object appear blurred. In long-sightedness a person can see distant objects clearly but near object appear blurred.

A person wears spectators with concave lenses. It means that normally (when not using glasses), the image of distant objects is focused in his eyes – (1) behind the retina (2) in front of the retina (3) on the retina (4) on the blind spot

Description : A person wears spectators with concave lenses. It means that normally (when not using glasses), the image of distant objects is focused in his eyes – (1) behind the retina (2) in front of the retina (3) on the retina (4) on the blind spot

Last Answer : (2) in front of the retina Explanation: A concave lens is used to correct short-sightedness (myopia). In myopia, images are formed in front of the retina, resulting in a blurred image. This ... relatively too long or the refractive powers of the cornea and lens of the eye are relatively too strong.

A person wears spectates with concave lenses. It means that normally (when not using glasses), the image of distant objects is focussed in his eyes (1) behind the retina (2) in front of the retina (3) on the retina (4) on the blind spot

Description : A person wears spectates with concave lenses. It means that normally (when not using glasses), the image of distant objects is focussed in his eyes (1) behind the retina (2) in front of the retina (3) on the retina (4) on the blind spot

Last Answer : in front of the retina

Who modernizes convex lenses ?

Description : Who modernizes convex lenses ?

Last Answer : Al Hazen by modernizing convex lenses.

Pick up the correct specification of Ramsden eyepiece from the following: (A) It consists of two equal piano convex lenses (B) The curved surfaces of Plano-convex lenses face each other (C) The distance between the diaphragm and the front lens of the eyepiece is kept equal to 1/4 th of the focal length of a lens so that rays from a point on the diaphragm enter the eye as a parallel beam (D) All the above

Description : Pick up the correct specification of Ramsden eyepiece from the following:  (A) It consists of two equal piano convex lenses  (B) The curved surfaces of Plano-convex lenses face each other  (C) ... from a point on the diaphragm enter the eye as a  parallel beam  (D) All the above 

Last Answer : (D) All the above 

Pick up the correct statement from the following: (A) A refracting telescope consists optically of two lenses (B) The principal axes of both the lenses coincide the optical axis of the telescope(C) The lens nearer the object to be viewed is convex and is called objective (D) All the above

Description : Pick up the correct statement from the following: (A) A refracting telescope consists optically of two lenses (B) The principal axes of both the lenses coincide the optical axis of the telescope (C) The lens nearer the object to be viewed is convex and is called objective (D) All the above

Last Answer : (D) All the above

What type of mirror is used by motorists to see the road behind them? (a) Convex (b) Concave (c) Plane (d) Concave-convex

Description : What type of mirror is used by motorists to see the road behind them? (a) Convex (b) Concave (c) Plane (d) Concave-convex

Last Answer : Ans:(a)

When light enters a closed room through a small hole in the door, the image of an outside building appears as inverted on the opposite wall. This is because (a) The hole acts as a convex lens (b) Light takes curvature at the edges of the hole (c) Of rectilinear propagation of light (d) The hole acts as a concave lens

Description : When light enters a closed room through a small hole in the door, the image of an outside building appears as inverted on the opposite wall. This is because (a) The hole acts as a convex lens (b) ... the edges of the hole (c) Of rectilinear propagation of light (d) The hole acts as a concave lens

Last Answer : Ans:(b)

The type of mirror used in the headlamps of cars is the (a) plane mirror (b) spherical convex mirror (c) spherical concave mirror (d) parabolic concave mirror

Description : The type of mirror used in the headlamps of cars is the (a) plane mirror (b) spherical convex mirror (c) spherical concave mirror (d) parabolic concave mirror

Last Answer : Ans:(d)

For the rear view, motorists use (a) plane mirror (b) concave mirror (c) convex mirror (d) cylindrical mirror

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Last Answer : Ans:(c)

Which of the following can be used as a burning glass? (a) Plane mirror (b) Convex mirror (c) Concave lens (d) Concave mirror

Description : Which of the following can be used as a burning glass? (a) Plane mirror (b) Convex mirror (c) Concave lens (d) Concave mirror

Last Answer : Ans:(d)

What type of mirror can be used to obtain the real image of an object? (a) Plane mirror (b) Concave mirror (c) Convex mirror (d) No mirror can produce a real image

Description : What type of mirror can be used to obtain the real image of an object? (a) Plane mirror (b) Concave mirror (c) Convex mirror (d) No mirror can produce a real image

Last Answer : Ans:(b)

Why is concave mirror used and not convex mirror? (a) because concave mirror can give real image. (b) because convex mirror can give real image. (c) because concave mirror cannot give real image. (d) because convex mirror cannot give virtual image.

Description : Why is concave mirror used and not convex mirror? (a) because concave mirror can give real image. (b) because convex mirror can give real image. (c) because concave mirror cannot give real image. (d) because convex mirror cannot give virtual image.

Last Answer : (a) because concave mirror can give real image.

A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The special mirror is made up of three types of mirrors in the following order from top downwards: (a) Convex, Plane, Concave (b) Plane, Convex, Concave (c) Concave, Plane, Convex (d) Convex, Concave, Plan

Description : A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The ... , Plane, Concave (b) Plane, Convex, Concave (c) Concave, Plane, Convex (d) Convex, Concave, Plan

Last Answer : (c) Concave, Plane, Convex

A real image of an object is to be obtained. The mirror required for this purpose is : (a) convex mirror (b) concave mirror (c) plane mirror (d) either convex or concave mirror

Description : A real image of an object is to be obtained. The mirror required for this purpose is : (a) convex mirror (b) concave mirror (c) plane mirror (d) either convex or concave mirror

Last Answer : (c) plane mirror

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Last Answer : Concave Slope: The slope is very gentle at the foot and it goes on getting steeper and steeper towards the top. The spacing between successive contours at the lower level is more than at the ... diagram. The spacing between successive contours at the lower level is less than at the higher level.

Draw the ray diagram in each case to show the position and nature of the image formed when the object is placed: (i) at the centre of curvature of a concave mirror (ii) between the pole P and focus F of a concave mirror (iii) in front of a convex mirror (iv) at 2F of a convex lens (v) in front of a concave lens -Physics

Description : Draw the ray diagram in each case to show the position and nature of the image formed when the object is placed: (i) at the centre of curvature of a concave mirror (ii) between the pole P and focus F of ... front of a convex mirror (iv) at 2F of a convex lens (v) in front of a concave lens -Physics

Last Answer : Answer. Nature of image: Real, inverted and same size image is formed at the centre of curvature. Nature of image: Virtual, enlarged and erect image is formed behind the mirror. Nature of image: Virtual ... : Virtual, erect and diminished image is formed between O and F on the same side of object.

report about convex and concave

Description : report about convex and concave

Last Answer : Make a list of all the convex and concave reflecting surface in your home and surroundings. Prepare ... your findings please i want it by report