Question

1. The focal point of a lens is the point

a. where all the light converges

b. where all the light diverges

c. where parallel light converges

d. between the center of the lens and the focal length

Reasons/justification too please

2. When a converging lens produces an image of the sun, the distance between the center of the lens and the image is called the

a. focal length

b. focal point

c. image length

d. lens abberration

Reasons/justifications too please

3. A distortions in an image is called

a. abberration

b. keratectomy

c. Dispersion

d. diffusion

reasons/ justification too please

4. A wave that is diffracted can

a. bend around edges of materials

b. alter the frequency of the wave

c. change the speed of the wave

d. amplify the amplitude of the wave

Reason/justification too please

5. When light undergoes interference, it can sometimes

a. build up to more than the sum of amplitudes

b. cancel completely

c. both of these

d. neither of these

reasons/justifications too please

6. when light undergoes interference, the quantity most affected is its

a. frequency

b. amplitude

c. wave nature

d. phase

reasons/justification too please

7. Interference is a property of

a. sound waves only

b. light waves only

c. standing waves only

d. all waves

reasons/justification too please

8. When light waves that are in phase meet, the result is

a. brighter light

b no light

c. dimmer light

d. light of shifted frequency

reasons/justifications too please

Answer 1

1.The focal point of the lens is the  point - c. where parallel light converges.

2.when a converging lens produces an image of sun,the distance between the center of lens and the image is called - a.focal length.

3. A distortions in an image is called- a. abberration

4. A wave that is diffracted can - a. bend around edges of material.

5. When light undergoes interference it can sometimes - b.cancel completely..

6. When light undergoes interference the quantity most affeced is its - d.phase

7. Interference is a prperty of - d.all waves.

8. When light waves that are in phase meet, the resuit is - a.brighter light