Answer: Photoelectric wave
Explanation: Because it represents an interaction between light and matter that describes light as an electromagnetic wave.
Speed = (frequency) x (wavelength)
Speed = (19 per second) x (7 mm)
Speed = (19 x 7) (per second · mm)
<em>Speed = 133 mm/sec</em>
or you might want to write <em>Speed = 0.133 m/s</em> .
Answer:
47.5kJ
Explanation:
Before climbing the cliff


At 2.

Answer:
a ) Its wavelength decreases
Explanation:
When a ray enters into air from glass slab its wavelength decreases.