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How is infra-red radiation used in television remotes?
The TV remote sends out infra-red radiation to the TV to command the TV to do stuff for example change channel, turn up the volume ETC. The TV receives the beam that was sent from the remote and "reads" the signal. The remote can send the beam in a straight line meaning the remote must be pointing straight at the TV with no interference and it cant be far from the TV.
Explain what the purpose is of radiation therapy as a treatment for cancer, and identify what type of wave from the electromagnetic spectrum is used in the therapy.
The purpose of radiation therapy for cancer is that it uses a high energy radiation which then kills or shrinks the cells because of the radiation is so strong it damages the cells DNA. Radiation therapy can either be treated outside the body by a machine or it can be injected to the tumor. The type of wave that is used in the radio therapy is X-ray. X-ray is high in energy but has a very short wave length, it is able to pass through many different materials.
Using the principle of refraction, explain why a swimmers leg looks different underwater compared to out of the water.
Swimmers legs look differently under water because the wave of light energy is bending on its way to your eye, this image can be seen differently.
How was the bionic eye developed? Include information on how it works, what is macular degeneration, and which patients does it benefit?
A bionic eye mimics the function of the retina (Contains cells sensitive to light) to restore sight for those with severe vision loss, it uses a retinal implant connected to a video camera to convert images into electrical impulses that activate remaining retinal cells which then carries the signal back to the brain. The bionic eye works by fitting a video camera into a pair of glasses which then will catch and prose the image These images are will then be sent wirelessly to a bionic implant at the back of the eye which stimulates the dormant optic nerves to generate points of light (phosphenes) that form the basis of images in the brain. The bionic eye benefits people with loss of sight. The bionic eye was developed by researching how the nerve cells behind our eye react to electrical stimulation. The NVRI is involved in research to develop prosthetic vision devices, a bionic eye is constructed from an array of stimulating electrodes. Muscular degeneration is often age-related. It is a medical condition that usually affects older adults, this results in the loss of vision in the centre of the visual field due to the damage of the retina.
The TV remote sends out infra-red radiation to the TV to command the TV to do stuff for example change channel, turn up the volume ETC. The TV receives the beam that was sent from the remote and "reads" the signal. The remote can send the beam in a straight line meaning the remote must be pointing straight at the TV with no interference and it cant be far from the TV.
Explain what the purpose is of radiation therapy as a treatment for cancer, and identify what type of wave from the electromagnetic spectrum is used in the therapy.
The purpose of radiation therapy for cancer is that it uses a high energy radiation which then kills or shrinks the cells because of the radiation is so strong it damages the cells DNA. Radiation therapy can either be treated outside the body by a machine or it can be injected to the tumor. The type of wave that is used in the radio therapy is X-ray. X-ray is high in energy but has a very short wave length, it is able to pass through many different materials.
Using the principle of refraction, explain why a swimmers leg looks different underwater compared to out of the water.
Swimmers legs look differently under water because the wave of light energy is bending on its way to your eye, this image can be seen differently.
How was the bionic eye developed? Include information on how it works, what is macular degeneration, and which patients does it benefit?
A bionic eye mimics the function of the retina (Contains cells sensitive to light) to restore sight for those with severe vision loss, it uses a retinal implant connected to a video camera to convert images into electrical impulses that activate remaining retinal cells which then carries the signal back to the brain. The bionic eye works by fitting a video camera into a pair of glasses which then will catch and prose the image These images are will then be sent wirelessly to a bionic implant at the back of the eye which stimulates the dormant optic nerves to generate points of light (phosphenes) that form the basis of images in the brain. The bionic eye benefits people with loss of sight. The bionic eye was developed by researching how the nerve cells behind our eye react to electrical stimulation. The NVRI is involved in research to develop prosthetic vision devices, a bionic eye is constructed from an array of stimulating electrodes. Muscular degeneration is often age-related. It is a medical condition that usually affects older adults, this results in the loss of vision in the centre of the visual field due to the damage of the retina.