Photo AI

Defects of vision can be corrected by changing the paths of light rays - Edexcel - GCSE Physics - Question 4 - 2016 - Paper 1

Question icon

Question 4

Defects-of-vision-can-be-corrected-by-changing-the-paths-of-light-rays-Edexcel-GCSE Physics-Question 4-2016-Paper 1.png

Defects of vision can be corrected by changing the paths of light rays. (a) Explain why light refracts towards the normal when it passes from air into glass or wate... show full transcript

Worked Solution & Example Answer:Defects of vision can be corrected by changing the paths of light rays - Edexcel - GCSE Physics - Question 4 - 2016 - Paper 1

Step 1

Explain why light refracts towards the normal when it passes from air into glass or water.

96%

114 rated

Answer

When light travels from air (a less dense medium) into glass or water (denser mediums), it slows down due to the change in medium. This change in speed causes the light rays to bend towards the normal line, which is an imaginary line perpendicular to the surface at the point of incidence. This bending occurs because of Snell's law, which states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant for a particular pair of media.

Step 2

Complete the sentence by putting a cross (X) in the box next to your answer.

99%

104 rated

Answer

The correct choice is B: lens and cornea. Light rays are focused on the retina after refraction primarily by the lens in conjunction with the cornea, which provides most of the initial bending of light.

Join the GCSE students using SimpleStudy...

97% of Students

Report Improved Results

98% of Students

Recommend to friends

100,000+

Students Supported

1 Million+

Questions answered

;