Physics-13 Lens and Electromagnetic waves

The point where the rays meet is known as....

• Fire
• the focal point
• refraction
• Plane of the lens

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NGSS.HS-PS4-5

Which describes a convex lens?

• triangular in shape
• more transparent in the middle
• thicker on the edges than in the middle
• thicker in the middle than on the edges

Is a concave lens thicker or thinner in the middle? 

• Thicker 
• Thinner 

When light waves move from passing through air to passing through a glass lens what happens to them?

• They slow down and change direction

• They speed up and change direction

• They maintain the same speed and change direction

• They maintain their same speed and direction

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NGSS.HS-PS4-1

Which part of the eye is this?

• Retina

• Iris

• Vitreous Humor

• Cornea

When an object is placed between the focal point and the optical centre of the convex lens, the image produced is ___.

• real, diminished, and inverted

• real, enlarged, and inverted

• virtual, enlarged, and erect

• virtual, diminished and erect

Bends light rays away and spreads them out. Make objects appear smaller.

• Convex Lenses

• Concave Lenses

• Convex Mirrors

• Concave Mirrors

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A person with CONCAVE GLASSES(lenses) are:

(Concave lenses spread the light before it enters the eyes so that the image is focused on the retina)

• Short-Sighted

• Long-Sighted

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NGSS.MS-PS4-2

A person with CONVEX GLASSES(lenses) are:

(Convex lenses concentrates the light before it enters the eyes so that the image is focused on the retina)

• Short-Sighted

• Long-Sighted

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NGSS.MS-PS4-2

Infrared was discovered by whom and what year?

• William Herschel – 1800

• William Herschel – 1840

• William Thomson – 1860

• William Crookes – 1810