TEST 12 (X-REFRACTION OF LIGHT AT PLANE SURFACES)

EFFORTS NEVER FAIL

NAME : *

1. The speed of light is_______ in vacuum *

1 point

3 x 10^5 m/s

3 x 10^8 m/s

3 x 10^8 km/s

3 x 10^6 m/s

2. We can see objects because of_______ *

1 point

reflection

refraction

transmission

diffraction

3. The refractive index of a rarer medium with respect to a denser medium is.. *

1 point

greater than 1

smaller than 1

negative

4. According to the sign convention, the distance of object... *

1 point

is always positive

is always negative

may be positive or negative

is equal to object height

5. According to the sign convention, the distance of image... *

1 point

is always positive

is always negative

may be positive or negative

is equal to image height

6. The refractive index of a denser medium with respect to a rarer medium is.. *

1 point

greater than 1

smaller than 1

negative

7. The image formed by a concave lens is *

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always real and enlarged

always real and diminished

always virtual and enlarged

always virtual and diminished

8. Which of the following has the highest refractive index? *

1 point

Glass

Water

Pearl

Diamond

9. The lens formula is ________ *

1 point

1/f = 1/u + 1/v

1/f = 1/u - 1/v

1/f = 1/v - 1/u

1/f + 1/v = u

10. Absolute refractive index of any medium is always _______ *

1 point

> 1

< 1

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