Ray Optics Test

Result

Ray Optics Test - 120

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following is a correct relation?

A
_αµ_r = _αµ_ω × _rµ_ω

B
_αµ_r = _rµ_ω × _ωµ_α

C
_αµ_r × _rµ_α = 0

D
_αµ_r / _ωµ_r × _αµ_ω

Solution
Question 2
4 / -1

The distance travelled by light in glass (refractive index =1.5) in a nano second will be

A
45 cm

B
40 cm

C
30 cm

D
20 cm

Solution
Question 3
4 / -1

When light is refracted from air into glass

A
Its wavelength and frequency both increase

B
Its wavelength increases but frequency remains unchanged

C
Its wavelength decreases but frequency remains unchanged

D
Its wavelength and frequency both decrease
Question 4
4 / -1

A mark at the bottom of a liquid appears to rise by 0.1 m. The depth of the liquid is 1 m. The refractive index of the liquid is

A
1.33

B
9/10

C
10/9

D
1.5

Solution
Question 5
4 / -1

A man standing in a swimming pool looks at a stone lying at the bottom. The depth of the swimming pool is h. At what distance from the surface of water is the image of the stone formed (Line of vision is normal; Refractive index of water is n)

A
h/n

B
n,/h

C
h

D
hn

Solution
Question 6
4 / -1

On heating a liquid, the refractive index generally

A
Decreases

B
Increases or decreases depending on the rate of heating

C
Does not change

D
Increases

Solution
Question 7
4 / -1

A

B

C

D

Solution
Question 8
4 / -1

The bottom of a container filled with liquid appear slightly raised because of

A
Refraction

B
Interference

C
Diffraction

D
Reflection
Question 9
4 / -1

The two lenses of an achromatic doublet should have

A
Equal powers

B
Equal dispersive powers

C
Equal ratio of their power and dispersive power

D
Sum of the product of their powers and dispersive power equal to zero
Question 10
4 / -1

Ray optics is valid, when characteristic dimensions are

A
Of the same order as the wavelength of light

B
Much smaller than the wavelength of light

C
Of the order of one millimetre

D
Much larger than the wavelength of light