Podcast
Questions and Answers
What is reflection from a smooth surface like that of a mirror called?
What is reflection from a smooth surface like that of a mirror called?
Which type of objects shine in the light of other objects?
Which type of objects shine in the light of other objects?
What are objects known as that emit their own light?
What are objects known as that emit their own light?
Where do we see nearly everything due to reflected light?
Where do we see nearly everything due to reflected light?
Signup and view all the answers
What is used to show someone how their hair has been cut at the back?
What is used to show someone how their hair has been cut at the back?
Signup and view all the answers
When may reflected rays be further reflected if incident on another mirror?
When may reflected rays be further reflected if incident on another mirror?
Signup and view all the answers
What is the part of the eye that controls the amount of light entering into the eye?
What is the part of the eye that controls the amount of light entering into the eye?
Signup and view all the answers
Where in the eye does the lens focus light?
Where in the eye does the lens focus light?
Signup and view all the answers
Which type of cells in the retina are sensitive to bright light?
Which type of cells in the retina are sensitive to bright light?
Signup and view all the answers
What is the area called where there are no sensory cells, making vision impossible at that spot?
What is the area called where there are no sensory cells, making vision impossible at that spot?
Signup and view all the answers
In which part of the eye is the lens thicker at the center?
In which part of the eye is the lens thicker at the center?
Signup and view all the answers
What cells in the retina sense color?
What cells in the retina sense color?
Signup and view all the answers
What is the purpose of using closed circuit television as mentioned in the text?
What is the purpose of using closed circuit television as mentioned in the text?
Signup and view all the answers
Who developed the Braille system?
Who developed the Braille system?
Signup and view all the answers
How many dot patterns or characters are there in the Braille system?
How many dot patterns or characters are there in the Braille system?
Signup and view all the answers
What do the dots arranged in cells of two vertical rows of three dots each represent in the Braille system?
What do the dots arranged in cells of two vertical rows of three dots each represent in the Braille system?
Signup and view all the answers
When was the present Braille system adopted?
When was the present Braille system adopted?
Signup and view all the answers
What is the main function of telescopic aids mentioned in the text?
What is the main function of telescopic aids mentioned in the text?
Signup and view all the answers
How do visually impaired people learn the Braille system?
How do visually impaired people learn the Braille system?
Signup and view all the answers
What is one way Braille texts can be produced?
What is one way Braille texts can be produced?
Signup and view all the answers
Which visually impaired Indian achieved excellence as a singer?
Which visually impaired Indian achieved excellence as a singer?
Signup and view all the answers
What degree did Ravindra Jain obtain despite being completely visually impaired?
What degree did Ravindra Jain obtain despite being completely visually impaired?
Signup and view all the answers
Who established an association for special education and rehabilitation of disabled in India?
Who established an association for special education and rehabilitation of disabled in India?
Signup and view all the answers
At what age did Helen A.Keller lose her sight?
At what age did Helen A.Keller lose her sight?
Signup and view all the answers
What happens when you bend the paper after spreading it on the table?
What happens when you bend the paper after spreading it on the table?
Signup and view all the answers
What does it indicate when you cannot see the reflected ray after bending the paper?
What does it indicate when you cannot see the reflected ray after bending the paper?
Signup and view all the answers
What is one of the laws of reflection mentioned in the text?
What is one of the laws of reflection mentioned in the text?
Signup and view all the answers
In Class VII, what features of an image formed by a plane mirror did Boojho study?
In Class VII, what features of an image formed by a plane mirror did Boojho study?
Signup and view all the answers
What activity involving a source of light and a plane mirror is described in the text?
What activity involving a source of light and a plane mirror is described in the text?
Signup and view all the answers
What should be drawn to determine the direction of reflected rays in the activity with a source of light and a plane mirror?
What should be drawn to determine the direction of reflected rays in the activity with a source of light and a plane mirror?
Signup and view all the answers
