What is Hypermetropia? Which type of lens is used to rectify it? [2+1]
WBBSE
Class X
Physical Science
Light – Reflection and Refraction
03 Mark
2025
Hypermetropia (Long-sightedness) is a defect of vision in which a person can see distant objects clearly but cannot see nearby objects distinctly.
It is corrected by using a convex lens.
Related Questions
More WBBSE Easy level questions
1/12
Q.
Define dispersion of light. How would you identify monochromatic light and composite light with the...
A.
Dispersion of Light is the phenomenon where light splits into its constituent...
Q.
Write down the relationship between relative refractive index and absolute refractive index. On which factors...
A.
Relative refractive index of medium 2 with respect to medium 1: 1μ2...
Q.
What is long-sightedness? What type of lens is used to remedy this defect?
A.
Long-sightedness, also known as hypermetropia, is a vision defect in which a...
Q.
Explain with a suitable ray diagram the process of formation of image by a concave...
A.
A concave lens always forms a virtual, erect and diminished image of...
Q.
For which value of the angle of incidence in refraction of light is Snell’s law...
A.
Angle of incidence = 0° (Normal incidence)
Q.
Explain with a diagram why the sky appears blue.
A.
Sunlight consists of seven colours. As it passes through the Earth's atmosphere,...
Q.
Which type of mirror produces a virtual, diminished and erect image?
A.
(c) Convex mirror Explanation A convex mirror always forms an image that...
Q.
What type of lens is used as a magnifying glass?
A.
Convex lens Explanation A convex lens is used as a magnifying glass...
Q.
Why is the red colour selected for danger signal lights?
A.
Red colour is selected for danger signal lights because it has the...
Q.
Where is the image formed if the object is placed in between f and 2f...
A.
beyond 2f
Q.
State whether the refractive index of a medium would increase or decrease if the angle...
A.
The refractive index of a medium is independent of the angle of...
Q.
Whether a concave lens is called a converging or diverging lens? Answer with reason.
A.
A concave lens is called a diverging lens. Reason: When parallel rays...