A person is advised to wear spectacles with convex lenses. What type of defect of vision is he suffering from?
2 Answers
Talk Doctor Online in Bissoy App
Talk Doctor Online in Bissoy App
The least distance of distinct vision for a young adult with normal vision is about
(c) The least distance of distinct vision is the minimum distance of an object to see clear and distinct image. It is 25 cm for a young adult with normal...
1 Answers 1 views
Based on the information given below classify each of the situations as ‘suffering from water scarcity’ or ‘not suffering from water scarcity’.
(a) Not suffering from water scarcity (b) Suffering from water scarcity (c) Suffering from water scarcity (d) Not suffering from water scarcity
1 Answers 1 views
A person is advised to wear spectacles with concave lenses. What type of defect of vision is he suffering from?
Near-sightedness/Short-sightedness/ Myopia.
1 Answers 1 views
What is colour-blindness? What kind of retinal cells are lacking in person suffering from this defect?
The defects of the eye due to which a person is unable to distinguish between certain colors is known as color blindness. Cone shaped retinal cells are responsible for making...
1 Answers 1 views
Why does a person suffering from hypermetropia prefer to remove his spectacles while looking at distant objects? Explain.
A hypermetropic eye can have a normal far point. If he uses spectacles of the converging lens, he will have more converging power than needed for parallel rays so the...
1 Answers 2 views
Boojho’s grandmother is suffering from diabetes. Her doctor advised her to take ‘Lassi’ with less fat content.
(c) Churning
1 Answers 1 views
A person needs a lens of power – 2.5 dioptres for correcting his vision. Name the defect of vision he is suffering from.
He is suffering from myopia Concave lens should be used to correct this defect of vision. f = 1/P = 1/(–2.5)m = – 4m
1 Answers 1 views
Two concave lenses L_1 and L_2 are kept in contact with each other. If the space between the two lenses is filled with a material
(c) increases EXPLANATION: The focal length F of the combination is given as 1/F = 1/f₁ + 1/f₂ It is like resistors connected in parallel. The numerical value of equivalent resistance is less...
1 Answers 1 views
There are 6 tasks and 6 persons. Task 1 cannot be assigned either to person 1 or to person 2; task 2 must be assigned to either person 3 or person 4
(a) Task 1 can not be assigned to either person 1 or 2 i.e. there are 4 options. Task 2 can be assigned to 3 or 4 So, there are only 2 options...
1 Answers 1 views
Have you seen someone blowing on their spectacles, to wipe them clean? How does the air from the mouth help in cleaning the spectacles?
The air blown from the mouth is hot and the glass of the spectacles is comparatively colder. The hot air we breathe out contains water vapours which turn into tiny...
1 Answers 1 views