Ray Optics Test

Result

Ray Optics Test - 119

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Weekly Quiz Competition

Question 1
4 / -1

When light travels from one medium to the other of which the refractive index is different, then which of the following will change?

A
Frequency, wavelength and velocity

B
Frequency and wavelength

C
Frequency and velocity

D
Wavelength and velocity
Question 2
4 / -1

A light wave has a frequency of 4 × 10¹⁴ Hz and awavelength of 5 × 10^–7metres in a medium. The refractive index of the medium is

A
1.5

B
1.33

C
1.0

D
0.66

Solution
Question 3
4 / -1

How much water should be filled in a container 21 cm in height, so that it appears half filled when viewed from the top of the container (given that _αµ_ω = 4/3)

A
8.0 cm

B
10.5 cm

C
12.0 cm

D
None of these

Solution
Question 4
4 / -1

Monochromatic light is refracted from air into the glass of refractive index µ. The ratio of the wavelength of incident and refracted waves is

A
1 : µ

B
1 : µ²

C
µ :1

D
1 : 1

Solution
Question 5
4 / -1

The refractive indices of glass and water w.r.t. air are 3/2 and 4/3 respectively. The refractive index of glass w.r.t. water will be

A
8/9

B
9/8

C
7/6

D
None of these

Solution
Question 6
4 / -1

If µ₀ be the relative permeability and K₀ the dielectric constant of a medium, its refractive index is given by

A

B

C

D

Solution
Question 7
4 / -1

If the speed of light in vacuum is C m/sec, then the velocity of light in a medium of refractive index 1.5

A
Is 1.5 ×C

B
Is C

C
Is C / 1.5

D
Can have any velocity

Solution
Question 8
4 / -1

A ray of light is incident on the surface of a glass plate of thickness t. If the angle of incidence θ is small, the emerging ray would be displaced side ways by an amount [take n = refractive index of glass]

A
tθn / (n + 1)

B
tθ (n – 1)/ n

C
tθn / (n – 1)

D
tθ (n + 1)/ n

Solution
Question 9
4 / -1

Monochromatic light of wavelength 589 nm is incident from air on a water surface. The refractive index of water is 1.33. The wavelength of the refracted light is

A
589 nm

B
443 nm

C
333 nm

D
221 nm

Solution
Question 10
4 / -1

Which of the following is not a correct statement?

A
The wavelength of red light is greater than the wavelength of green light

B
The wavelength of blue light is smaller than the wavelength of orange light

C
The frequency of green light is greater than the frequency of blue light

D
The frequency of violet light is greater than the frequency of blue light