Anyway, we have no choice but to accept his proposal.

If the angle of incidence is large, the reflection becomes stronger.

The calculation of the spherical angle is a part of geometry.

When light enters water, the angle of refraction changes.

The pheasant-tailed jacana, known as 'the ballerina of the water' for its beautiful appearance.

His research mainly focuses on the chelicerae of spiders.

The antennae of this insect are very long.

The dogfish is a type of shark that lives in the deep sea.

When light hits a mirror, the angle of incidence and the angle of reflection become equal.

The angle of friction of this material is 30 degrees.