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Measure skillsfrom any curriculum
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from any curriculum
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10 questions
Show answers
- Q1What is refraction?The change in direction of light as it passes from one medium to anotherThe manipulation of light to form bright and dark spots by passing it through a narrow slitThe ability of light to penetrate solid objectsThe ability of light to spread out to fill a room30s
- Q2How does a lens work?It forms an image by refracting lightIt forms an image by diffracting lightIt forms an image by diffracting lightIt forms an image by diffusing light30s
- Q3Consider a convex lens - parallel rays of light are brought to a focus at which point?Secondary focusFocal placePrincipal focusPrimary focus30s
- Q4What is the distance from the lens to the principal focus called?Focal widthFocal lengthFocal pointFocal height30s
- Q5Which formula correctly states how refractive index is related to the angles of incidence and refraction?refractive index = sin i⁄2 sin rrefractive index = sin i⁄sin rrefractive index = 2 sin i⁄sin rrefractive index = sin r⁄sin i30s
- Q6What does i represent in the above equation?The normalThe refractive indexThe angle of refractionThe angle of incidence30s
- Q7What does r represent in the above equationThe normalThe angle of refractionThe refractive indexThe angle of incidence30s
- Q8The nature of an image produced by a lens is defined by which attributes?Whether the image is upright or inverted relative to the objectThe relative size of the imageWhether the image is real or virtualAll of these30s
- Q9Which type of lens would be a good choice to use for the purposes of magnification?A converging lensA concave lensBi concave lensDiverging lens30s
- Q10What is the refractive index of a medium when light is incident upon it at 45o to the normal and the angle of the refraction is 30o from the normal?1.41.21.31.130s