PLEASE ANSWER EACH BOLDED QUESTION & WRITE NEATLY- THANK YOU:) An object is plac

Question

PLEASE ANSWER EACH BOLDED QUESTION & WRITE NEATLY- THANK YOU:)

An object is placed in front of a converging lens. which of the following statements is true?

a) the image is always real
b) the image is always in the back of the lens
c)the image is always smaller
d)the image can be upright or inverted
e) the image is always in front of the lens

The total internal reflection is possible only if light travels?

a) from low to high index of refraction, with angle of incidence greater than the critical angle

b) from low to high index of refraction, with angle of incidence smaller than the critical angle

c) from high to low index of refraction, with the angle of incidence smaller than the critical angle

d) from high to low index of refraction, with the angle of incidence greater than the critical angle

How long does it take for a microwave radar signal to travel from Earth to Mars & back? (The distance from Earth to Mars is 7.84E7 km)

a)35.5

b)8.15

c)4.36

d)1hr 06 min

e) 2hr 15min

Explanation / Answer

When an object is placed in front of converging lens

d. image can be upright or inverted.

Time taken for a microwave radar signal to travel from Earth to Mars and back

b) 8.15min

Total internal is possible only if light travels

d) from high to low index of refraction, with the angle of incidence greater than the critical angle

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