Question

Out of the following, which material has greatest critical angle:

A) Water
B) Crown glass
C) Flint glass
D) Diamond​

Answer 1

Answer:

crown glass has the greatest critical angle

Answer 2

Answer:

The correct answer is Option B : crown glass.

Explanation:

• The critical angle for water is $49^0$
• Critical angle for flint glass is $36^0$
• For the crown glass, the critical angle is $61^0$
• The critical angle for diamond is $30^0$

Crown glass:

A form of optical glass called crown glass is used in lenses and other optical parts.

It has a low dispersion and a relatively low refractive index.

Flint glass:

Flint glass, used to manufacture lenses and prisms in the optical glass industry, is any highly refractive lead-containing glass.

It is also used for telescope lenses since it absorbs the majority of ultraviolet radiation but relatively little visible light.

Diamond:

With its atoms grouped in what is known as a diamond cubic crystal structure, diamond is a solid form of the element carbon.

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