ORAL QUESTIONS
1. The eye can control the amount of light falling on the retina. Which part of the eye is responsible
for this?
2. The eve can change the focal length of its lens. Which part of the eye is responsible for this?
How does the changing focal length help us?
3. A person cannot see near objects clearly. What kind of lens should his spectacles have to correct
this-convex or concave?
4. What is the farthest distance you can see if you have a normal eye?
5. Braille is a language different from English and other languages. Do you agree? Give reasons.
Answers
Answer:
1. The colored part of the eye which helps regulate the amount of light entering the eye. When there is bright light, the iris closes the pupil to let in less light. And when there is low light, the iris opens up the pupil to let in more light. Focuses light rays onto the retina.
2. The lens is a flexible tissue, which is transparent and is located behind the pupil and iris. Because of lens flexibility and elasticity, it helps to focus on the far or near objects. either far or near objects. By the action of ciliary muscles, The eye focus length is changed by the action of ciliary muscles.
3. Myopia or short-sightedness can be corrected by wearing spectacles containing concave lens. This is because when a concave lens of suitable power is used for the myopic eye then the concave lens first diverge the parallel rays of light coming from distant object.
4. 3 miles
Earth's curvature
The Earth curves about 8 inches per mile. As a result, on a flat surface with your eyes 5 feet or so off the ground, the farthest edge that you can see is about 3 miles away
5. Braille Is Not a Language. Here’s What That Means for You.
It may surprise those not familiar with accessibility efforts that braille is not a separate language. The truth about braille—what it is and how it is used—can and should inform your business’s accessibility strategy.
What is braille?
First, if braille is not a language, then what is it? Unlike American Sign Language, which is a fully-developed language, braille is a reading and writing system used by people with visual impairment and blindness. Braille operates just like printed text, as a code that reproduces the sounds, phonetics, and semantics of a language.
There is more than one type of braille.
There are two commonly used types of braille. The first, Grade 1 braille, is made up of the 26 letters of the Roman or Latin alphabet. This braille is mostly used by those just learning to read and write in braille. Grade 2 braille is more complex. It includes the 26 letters of the alphabet as well as contractions and punctuation. This is the braille you see on most public signs, restaurant menus, and other materials written in braille.
There is a third type of braille, Grade 3, but this is more of a shorthand and typically only used for personal use in diaries, letters, and notes.
Why are there contractions in braille?
Braille takes up more space than printed text. For this reason, braille uses short sequences, called contractions, to take the place of words or letter groups that commonly occur in the language. For example, “the” is usually just one character in braille. The contractions save space, and they also improve the speed of writing and reading.
Answer:
he colored part of the eye which helps regulate the amount of light entering the eye. When there is bright light, the iris closes the pupil to let in less light. And when there is low light, the iris opens up the pupil to let in more light. Focuses light rays onto the retina.
Explanation: