Reflection of Light and How Do We See

Q.

We can see objects due to ___ of light.

Q.

Light can be thought of which of the following to explain its various properties?

1. Wave

2. Ray

3. Particle

4. All of these

Q.

How do we see objects?

1. Light from our eyes leaves and illuminates the objects.

2. Every object is a light source and sends light to our eyes

3. Light from a light source is reflected by the object and when these fall on our eyes we see the object

4. All of these

Q.

Light falling on a surface and going back in the same medium is an example of ____.

1. diffusion

2. reflection

3. refraction

4. scattering

Q.

Which of the following materials allows light to pass through it?

1. Transparent

2. Translucent

3. Both

4. None

Q.

Which of the following best depicts how we see objects?

1. 

2. 

3. 

4. 

Q.

The phenomenon of light hitting a surface and then bouncing off is termed as:-

1. Refraction

2. None of these

3. Reflection

4. Diffusion

Q. What is the unit of refractive index?

1. m/s
2. m
3. It has no unit.
4. Hz

Q. For a light ray passing from air to water, according to Snell's law:
($n$ represents refractive index of the medium, ${\theta }_{air}$ is the angle of incidence and ${\theta }_{water}$ is the angle of refraction)

1. $n_{air}$ $Sin{\theta }_{air}$ = $n_{water}$ $Sin{\theta }_{water}$
2. $n_{air}$ $Sin{\theta }_{water}$ = $n_{water}$ $Sin{\theta }_{air}$
3. $n_{air}$ $Sin{\theta }_{air}$ $n_{water}$ $Sin{\theta }_{water}$ = 1
4. $n_{air}$ $n_{water}$ = $Sin{\theta }_{water}$ $Sin{\theta }_{air}$

Q.

Given that i is angle of incidence and r is angle of refraction for a light ray at a boundary, the correct expression for Snell's Law is:

1. $\sin i={\sin }^{2}r$

2. $\sin i=k\sin r$
   [where k = constant]

3. $\cos i=k\cos r$
   [k = constant]

4. $\sin r={\sin }^{2}i$