If the refractive index of crown glass is 1.51, its critical angle is?

Margiekatrina

2 years ago

how will we be able to use sine inverse when the calculator on the screen is just for simple arithmetics?

BlissPure

1 year ago

Ok Guys. This is not a f**lproof method tho,
Everyone is meant to know the sin and cosine and tan of the 4 basic angles which are 30, 60, 90 and 45.
So from that knowledge you know that sin 45 is 1/root2 which is 0.7071.
You then use your head and calculate what 0.6622 will be.
You know it will be lower than 45, but not that much lower, and then you pick your answer.
This is only for when the angles given in the options are not to close together.
If it is, then I dont know.

Tonyrex11

9 years ago

that is sin inverse

Habibullah123

4 years ago

From the formula
SinC=1/n
We are looking for C so C= sin^-1 1/n

Greatness

1 year ago

Sir pls how can you find the sine inverse without using calculator

obakenny01

10 years ago

The last step is not clear

esegbueoke

5 years ago

your explanation is not clear pls can you explain again

amarachiadaeze

6 years ago

physics is too hard

azekah

1 year ago

u can't get sin•1 without the use of a scientific calculator

lizzyluv123

2 months ago

how can we use jamb calculator to solve this type of question