History of Snell's Law

Q.

The meter is defined as the distance traveled by light in 1/299792458 seconds? why didn't people choose some easier number than 1/300000000 seconds? why not 1 second?

Q.

When light is incident on a medium at angle i and refracted into a second medium at an angle r, the graph of sin i vs sinr is as shown in the graph. From this, one can conclude that

1. Velocity of light in the second medium is 1.73 times the velocity of light in the I medium

2. Velocity of light in the I medium is 1.73 times the velocity in the II medium

3. 
4. 

Q.

According to Snell's law, the value of the constant depends on :

1. The angle of incidence

2. The pair of media

3. The pair and order of media (where order implies from where to where )

4. The angle of refraction

Q. Critical angle for light moving from nedium 1 to medium 2 is theta. The speed of light in medium 1 is v. The speed in medium 2 is-
a. v(1-cos theta)
b. v/sin theta
c. v/cos theta
d. v(1-sin theta)

Q. Light is incident from air on oil at an angle of 30 degrees after moving through oil one and another medium oil 2 it enters glass and then it enters water. If the refractive indices of Glass and water are 1.5 and 1.3 respectively find the angle which is the Ray makes with normal in water.

Q. For the same value of angle of incidence, the angle of refraction in 3 media A, B and C are 15 degrees, 25 degrees and 35 degrees respectively. In which medium would the velocity of light be minimum

Q. When a point source is inside at a depth H in water (refractive index Image not present), the fraction of light coming out of the water is a. When source is placed at depth 2H, fraction of light escaped from water is b. Then find relation between a and b.

Q.

Light of wavelength λ in vacuum enters a medium of refractive index μ. Two points in this medium, lying along the path of this light, are at a distance apart. The phase difference between these points is

1. 

2. 

3. 

4. 

Q.

If for a pair of media, the value of $\frac{sini}{sinr}$ is greater than 1, then which of the following statement is true?

1. If light goes from medium A to medium B, it will bend towards the normal

2. If light goes from medium A to medium B, it will bend away from the normal

3. If light goes from medium A to medium B its speed reduces
4. If light goes from medium B to medium A its speed increases

Q. According to Huygens, the ether medium pervading entire universe is

1. Less elastic and more dense
2. Highly elastic and less dense
3. Not elastic
4. Much heavier

Q.

When light undergoes refraction, its frequency

1. Increases

2. Decreases

3. Increases exponentially

4. Remains same

Q. It's means that if angle of incidence= angle of refraction the the refractive index should be same .but for normal refraction ( not from prism ) this condition is true then why not for prism .

Q. Optically active substances are those substances which

1. produces double refraction
2. rotate the plane of polarisation of polarised light
3. produces polarised light
4. converts a plane polarised light into circularly polarised light

Q.

Refraction is the phenomena of :

1. light travelling from one medium to another

2. bending of light while it changes its medium

3. Bouncing off of light when it strikes a medium

4. Decrease in the intensity of light when it passes from one medium to the other

Q. A light ray passes from air into another medium at point $P$. How long does it take the light ray to travel from $P$ to $Q$?

1. $9\times {10}^{-7}s$
2. $9\times {10}^{-10}s$
3. $9\times {10}^{-8}s$
4. $9\times {10}^{-6}s$

Q. Water is optically________ than glass.

1. Rarer
2. Denser
3. Neutral
4. None

Q.

When light undergoes refraction, the wavelength

1. Decreases in denser medium

2. Increases in denser medium

3. Increases in rarer medium

4. Decreases in rarer medium

Q.

Refraction is the phenomena of :

1. light travelling from one medium to another

2. bending of light while it changes its medium

3. Decrease in the intensity of light when it passes from one medium to the other

4. Bouncing off of light when it strikes a medium

Q.

distinguish between refraction and diffraction with example

Q. The critical angle of incidence in a glass salb placed in air is 45°. What will be the critical angle when it is immersed in water of refractive index 1.33.

Q. Diffraction occurs when light:

1. Travels into a new medium in which it has a new speed
2. Is polarized by reflection
3. Passes through broken or fractured glass
4. Passes through a narrow slit
5. Is absorbed by atoms in a rarefield gas

Q.

According to Snell's law, the value of the constant depends on :

1. The pair of media

2. The pair and order of media (where order implies from where to where )

3. The angle of incidence

4. The angle of refraction

Q. Fish in the aquarium appears smaller in size due to refraction phenomena. Is the statement True or False?

1. True
2. False