Lenses can be found in a variety of objects which example does not have a lens?

a.) diving mask
b.) smart phone
c.) electron microscope
d.) night vision goggles

The correct option is B). Smart phone.

Explanation:

Consider the provided options:

Diving masks and night vision goggles have a lens.

Electron microscopes have electromagnetic lenses or electron optical lens systems.

Which means diving mask, electron microscope and night vision goggles have a lens.

Thus, the correct option is B). Smart phone.

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50

pe = weightxheight = 2000x1000=2,000,000joules