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Gcse Physics
Light - Lenses 01
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Q.1
What is refraction?
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The manipulation of light to form bright and dark spots by passing it through a narrow slit
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The change in direction of light as it passes from one medium to another
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The ability of light to spread out to fill a room
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The ability of light to penetrate solid objects
Q.2
How does a lens work?
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It forms an image by refracting light
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It forms an image by diffracting light
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It forms an image by diffusing light
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It takes a picture with a digital camera and tags it on Facebook for you to see
Q.3
Consider a convex lens - parallel rays of light are brought to a focus at which point?
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Secondary focus
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Primary focus
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Principal focus
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Focal place
Q.4
What is the distance from the lens to the principal focus called?
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Focal width
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Focal height
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Focal length
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Focal point
Q.5
Which formula correctly states how refractive index is related to the angles of incidence and refraction?
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refractive index = sin i⁄sin r
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refractive index = sin r⁄sin i
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refractive index = sin i⁄2 sin r
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refractive index = 2 sin i⁄sin r
Q.6
What does represent in the above equation?
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The normal
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The angle of refraction
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The angle of incidence
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The refractive index
Q.7
The nature of an image produced by a lens is defined by which attributes?
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The relative size of the image
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Whether the image is upright or inverted relative to the object
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Whether the image is real or virtual
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All of the above
Q.8
Which type of lens would be a good choice to use for the purposes of magnification?
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Diverging lens
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A concave lens
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A converging lens
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Bi concave lens
Q.9
What is the refractive index of a medium when light is incident upon it at 45 to the normal and the angle of the refraction is 30 from the normal?
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1.1
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1.4
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