Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Physics Wave

Which of the following is true for light as it travels from air into water?

1

Its velocity increases.

2

Its frequency decreases.

3

Both its wavelength and velocity decrease.

4

More than one of the above

5

None of the above

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