Ray Optics Test

Result

Ray Optics Test - 137

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Weekly Quiz Competition

Question 1
4 / -1

The refractive index of a material of a prism of angles 45° – 45° – 90° is 1.5. The path of the ray of light incident normally on the hypotenuse side is shown in

A

B

C

D
Question 2
4 / -1

At the time of total solar eclipse, the spectrum of solar radiation would be

A
A large number of dark Fraunhoffer lines

B
A less number of dark Fraunhoffer lines

C
No lines at all

D
All Fraunhoffer lines changed into brilliant colours
Question 3
4 / -1

Angle of deviation (δ) by a prism (refractive index =11 and supposing the angle of prism A to be small) can be given by

A

B

C

D
Question 4
4 / -1

Angle of prism is A and its one surface is silvered. Light rays falling at an angle of incidence 2A on first surface return back through the same path after suffering reflection at second silvered surface. Refractive index of the material of prism is

A
2 sin A

B
2 cos A

C
1/2cos A

D
tan A

Solution
Question 5
4 / -1

When seen in green light, the saffron and green portions of our National Flag will appear to be

A
Black

B
Black and green respectively

C
Green

D
Green and yellow respectively
Question 6
4 / -1

Line spectrum contains information about

A
The atoms of the prism

B
The atoms of the source

C
The molecules of the source

D
The atoms as well as molecules of the source
Question 7
4 / -1

Missing lines in a continuous spectrum reveal

A
Defects of the observing instrument

B
Absence of some elements in the light source

C
Presence in the light source of hot vapors of some elements

D
Presence of cool vapors of some elements around the light source
Question 8
4 / -1

A source emits light of wavelength 4700 Å, 5400 Åand 6500 Å. The light passes through red glass before being tested by a spectrometer. Which wavelength is seen in the spectrum

A
6500 Å

B
5400 Å

C
4700 Å

D
All of the above
Question 9
4 / -1

Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation

A
Scattering

B
Diffraction

C
Interference

D
Polarization
Question 10
4 / -1

Which of the following diagrams shows correctly the dispersion of white light by a prism?

A

B

C

D