Neap Tide, Lenses, Waves Multiple Choice?

Question

I would really really greatly appreciate it if you guys could help me with a few of these MC Questions.

1. Lenses produce images by the process of:
a.Refraction
b.Polarization
c.Elimination
d.Diffraction
e.Reflection


2.Which one of these is constant for all types of electromagnetic waves in empty space?
a.Speed
b.Frequency
c.Direction
d.Energy
e.Wavelength

3.What physical effect or phenomenon can only be explained using a particle picture of light?
a.Photoelectric effect
b.Rainbow
c.Doppler effect
d.Double-slit interference of light
e.Magnetic dynamo effect


I will be very grateful for everyones help

thank you

can someone please help me.

I need to have these questions answered for hw by 11:59 PM today and am having trouble finding the answers

thanks

I FIGURED OUT #2

THANKS FOR #3

Answer 1

The first two are pretty simple questions - perhaps you are overthinking them?

1. There are two main types of telescopes, reflectors and refractors. Look them up and find out why they are called that.

2. Light is the another name for electromagnetic waves. What do you know about light?

3. e has nothing to do with light, so you can eliminate it outright. Look up what causes the other 4 phenomena and you'll find your answer. (Hint - 3 can be explained by the wave nature of light, light waves refracting and reflecting and interfering. The other one needs the particle nature of light, the discovery of which earned a very famous scientist the nobel prize)

Answer 2

A and Grape Jelly