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प्रश्न
A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in Figure . In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky?
 |
 |
 |
 |
| (i) | (ii) | (iii) | (iv) |
विकल्प
(i)
(ii)
(iii)
(iv)
उत्तर
(ii)
Explanation -
If Prism is kept with base BC at the bottom, then the emerged band of colour would show violet at the bottom.
If Prism is kept with base BC at the top, then violet would be at the top, followed by indigo and blue.
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संबंधित प्रश्न
Out of animals of prey and predators, which have their eyes:
at the front of their head?
What are the advantages of having two eyes instead of just one?
The animal which does not have eyes that look sideways is:
(a) Horse
(b) Chicken
(c) Lion
(d) Fish
Name the muscles of the eye responsible for the power of accommodation.
Give Technical Term:
The cells of the retina that are sensitive to colour.
Write the name.
The part of human eye that transmits electrical signals to the brain.
The image of an object at an infinite distance is obtained in a real and erect form through a convex magnifying glass.
Write the function of the human eye and label parts of the figure given below.
Match the following
| 1. | Conjunctiva | a. | Coloured part of eye |
| 2. | Cornea | b. | Photosensitive layer |
| 3. | Iris | c. | Refraction |
| 4. | Retina | d. | Protection |
Match the terms in column I with those in column II and write down the matching pairs.
| Column I | Column II | ||
| (i) | Conjunctiva | (a) | Viral infection |
| (ii) | Cornea | (b) | Ciliary body |
| (iii) | Choroid | (c) | Spiral-shaped |
| (iv) | Cochlea | (d) | Transparent epithelium |
| (v) | Conjunctivitis | (e) | Suspensory ligament |
| (f) | Contains melanin | ||
| (g) | Transparent but appears black |
