EASY
10th CBSE
IMPORTANT
Earn 100
What is hypermetropia? How is it caused? How can it be corrected? Explain with the help of a diagram.
Important Questions on The Human Eye and Colourful World
EASY
10th CBSE
IMPORTANT
What is presbyopia? How is it caused? How can it be corrected?
MEDIUM
10th CBSE
IMPORTANT
Explain the phenomenon of dispersion of light by means of a diagram and discuss its cause.
MEDIUM
10th CBSE
IMPORTANT
Write the constituent colours of white light in order of increasing wavelength.
EASY
10th CBSE
IMPORTANT
Sania and Shreya are best friends and study in grade , recently, Sania has been facing difficulty in reading the black-board text from the last desk. Shreya is a little uncomfortable and wonders why Sania avoids sitting on the last desk. On observation, she found that Sania often carries junk food in her lunch. Shreya has started sharing her lunch full of green vegetables and fruits with her. Sania is now better and has also started taking a 'balanced diet'.
Name the eye defect Sania is suffering from.
HARD
10th CBSE
IMPORTANT
Sania and Shreya are best friends and study in grade . Recently, Sania has been facing difficulty in reading the black-board text from the last desk. Shreya is little uncomfortable and wonders why Sania avoids sitting on the last desk. On observation, she found that Sania often carries junk food in her lunch. Shreya has started sharing her lunch full of green vegetables and fruits with her. Sania is now better and has also started taking a 'balanced diet'.
What are the two deformities related to her eye defect?
MEDIUM
10th CBSE
IMPORTANT
Sania and Shreya are best friends and study in grade , recently, Sania has been facing difficulty in reading the black-board text from the last desk. Shreya is a little uncomfortable and wonders why Sania avoids sitting on the last desk. On observation, she found that Sania often carries junk food in her lunch. Shreya has started sharing her lunch full of green vegetables and fruits with her. Sania is now better and has also started taking a 'balanced diet'.
What value is shown by Shreya and Sania?
EASY
10th CBSE
IMPORTANT
Anil passed a narrow beam of white light through a glass prism. He observed that the emergent light is comprising several colours. The phenomenon of splitting of light into its component colours on passing through a glass prism is known as dispersion. The phenomenon of dispersion shows that the white light is a mixture of seven colours which are: violet, indigo, blue, green, yellow, orange and red. Each colour has its own characteristics wavelength. It is observed that the refractive index of glass for violet colour is greater than the refractive index of glass for red colour. Angle of deviation is directly proportional to the refractive index of medium. Thus, the dispersion takes place because the refractive index of medium for different wavelengths (colours) is different.
Which colour has the maximum angle of deviation?
MEDIUM
10th CBSE
IMPORTANT
Anil passed a narrow beam of white light through a glass prism. He observed that the emergent light is comprising several colours. The phenomenon of splitting of light into its component colours on passing through a glass prism is known as dispersion. The phenomenon of dispersion shows that the white light is a mixture of seven colours which are: violet, indigo, blue, green, yellow, orange and red. Each colour has its own characteristics wavelength. It is observed that the refractive index of glass for violet colour is greater than the refractive index of glass for red colour. Angle of deviation is directly proportional to the refractive index of medium. Thus, the dispersion takes place because the refractive index of medium for different wavelengths (colours) is different.
Why is the dispersion produced by the glass prism?
