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Sound of Music. Learning check! #5. 1.Which lens would make the best magnifying glass ?. A. Diverging, long focal length. B. Converging, long focal length. C. Diverging short focal length. D. Converging, short focal length. 2.Real is positive means. - PowerPoint PPT Presentation

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• Sound of MusicLearning check!#5

• 1.Which lens would make the best magnifying glass ?A. Diverging, long focal lengthB. Converging, long focal lengthC. Diverging short focal lengthD. Converging, short focal length

• 2.Real is positive meansA. Diverging lenses have negative focal lengthsB. Diverging lenses never produce real imagesC. Converging lenses always produce real imagesD. Converging lenses only produce real images from close up objects

• 3. 1/u + 1/v = 1/fA. u = image distanceB. v =object distanceC. v = image distanceD. f = u + v

• 4.Which does NOT apply to the power of a lensA. Measured in m-1B. 1/fC. Measured in DD. Always positive

• 5.A diverging lens CAN produce a real image if A. It has a high powerB. The object is virtualC. The object is closer than the focal lengthD. The image is diminished

• 6.u =4cm, v = 6cm, f =?A. 2.4cmB. 5cmC. 3cmD. 10cm

• 7.u=3cm, v=-4cm, f= ?A. 0.83cmB. 12cmC. 12cmD. 0.83cm

• 8.The lens formula applies toA. Thin mirrorsB. All lensesC. Thin lensesD. Octopus eyes

• 9.This object is placed 4cm from a converging lens of focal length 6cm. Its image isA. B. C. D.

• 10.Your favourite physics teachers eyesight has deteriorated from 2.25D to 2.50D in 5 years. What is the rate of change of focal length in mmyr-1 ?A.-0.0089 B 11.25C. 0.0089D. 1.25

• 11.Which has the longest focal length?A. Diverging lens, red lightB. Converging, lens blue lightC. Diverging lens blue lightD. Converging, lens red light

• 12.Penguin eyes are more powerfulA. On landB. In waterC. In spaceD. In a pile of fish gutsThink more powerful means f has decreased

• 1.Which lens would make the best magnifying glass ?A. Diverging, long focal lengthB. Converging, long focal lengthC. Diverging short focal lengthD. Converging, short focal length

• 2.Real is positive meansA. Diverging lenses have negative focal lengthsB. Diverging lenses never produce real imagesC. Converging lenses always produce real imagesD. Converging lenses only produce real images from close up objects

• 3. 1/u + 1/v = 1/fA. u = image distanceB. v =object distanceC. v = image distanceD. f = u + v

• 4.Which does NOT apply to the power of a lensA. Measured in m-1B. 1/fC. Measured in DD. Always positive

• 5.A diverging lens CAN produce a real image if A. It has a high powerB. The object is virtualC. The object is closer than the focal lengthD. The image is diminished

• 6.u =4cm, v = 6cm, f =?A. 2.4cmB. 5cmC. 3cmD. 10cm

• 7.u=3cm, v=-4cm, f= ?A. 0.83cmB. 12cmC. 12cmD. 0.83cm

• 8.The lens formula applies toA. Thin mirrorsB. All lensesC. Thin lensesD. Octopus eyes

• 9.This object is placed 4cm from a converging lens of focal length 6cm. Its image isA. B. C. D.

• 10.Your favourite physics teachers eyesight has deteriorated from 2.25D to 2.50D in 5 years. What is the rate of change of focal length in mmyr-1 ?A.-0.0089 B 11.25C. 0.0089D. 1.25

• 11.Which has the longest focal length?A. Diverging lens, red lightB. Converging, lens blue lightC. Diverging lens blue lightD. Converging, lens red light

• 12.Penguin eyes are more powerfulA. On landB. In waterC. In spaceD. In a pile of fish gutsThink more powerful means f has decreasedFor the best refraction you want the biggest difference refractive indexC. In space