Guys please help me in this worksheet
Answers
Answer:
1 - 15 cm
2 - yellow spot
ok I can give the answer of two' so mark me as brainleast
Answer:
1)20cm
2)don't know (I think pupil or yellow spot
3)Multiple reflection of light is the reflection of light back and forth through reflecting surfaces several times. When the reflection of a reflected light ray on another object is mirrored again, it is called multiple reflections.
4)a.The optic nerve is located in the back of the eye. It is also called the second cranial nerve or cranial nerve II. It is the second of several pairs of cranial nerves. The job of the optic nerve is to transfer visual information from the retina to the vision centers of the brain via electrical impulses.
b. The retina is a thin layer of tissue that lines the back of the eye on the inside. It is located near the optic nerve. The purpose of the retina is to receive light that the lens has focused, convert the light into neural signals, and send these signals on to the brain for visual recognition.
c. The cornea acts as the eye's outermost lens. It functions like a window that controls and focuses the entry of light into the eye. The cornea contributes between 65- 75 percent of the eye's total focusing power.
5)When white light is passed through a glass prism it splits into its spectrum of colours (in order violet, indigo, blue, green, yellow, orange and red) and this process of white light splitting into its constituent colours is termed as dispersion.
The simplest way to explain dispersion is through dispersion in the prism.
6)The difference between myopia and hyperopia is whether you have difficulty seeing up close or at a distance.
Hyperopia (farsightedness) makes it hard to see things that are close.
Myopia (nearsightedness) makes it difficult to see things that are far away.
7)A periscope lets you look around walls, corners or other obstacles. Submarines have periscopes so that people inside can what is on the surface of the water. A periscope is a useful example of the law of reflection at work.
8)A kaleidoscope is composed of a hollow tube. Three mirrors are placed in the form of a triangular tube and their reflecting surfaces face each other. One end of the tube is covered with a transparent sheet and another end is covered with an opaque sheet.
9)The eye adjusts to the new level of light by making our pupil smaller (constricting). When a person walking in bright light enters a dark room, he is not able to see clearly because the iris is unable to dilate the pupil immediately. This phenomenon is called as photophobia.
Explanation:
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