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प्रश्न
Part of the eye which controls the light entering is called
विकल्प
iris
cornea
lens
retina
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उत्तर
iris
Explanation:
Iris is a dark muscular structure behind the cornea, which controls the amount of light entering into the eye.
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संबंधित प्रश्न
Differentiate between the reflection of light from a plane mirror and that from a plane sheet of paper.
The diagram in Figure shows a point object P in front of a plane mirror MM1.
(a) Complete the diagram by taking two rays from the point P to show the formation of its image.
(b) In the diagram, mark the position of eye to see the image.
(c) Is the image formed real or virtual? Explain why?
What type of mirror is used to obtain a real image-of an object?
An object 1.5 cm high when placed in front of a concave. the mirror produces a virtual image 3 cm high. If the object is placed at a distance of 6 cm from the pole of the mirror, calculate:
- the position of the image
- the focal length of the mirror.
A boy is standing in front of a plane mirror at a distance of 3 m from it.
(i) What is the distance between the boy and his image?
(ii) If the boy moves 1 m backward, find the distance between the image and the boy.
______Surface reflects the light well.
State the direction of incident ray which after reflection from a spherical mirror retraces its path. Give reason for your answer.
Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown in the Figure Which of the following could be inside the box?
