1.
Which of the following produces absorption spectrum?
2.
A cool gas in front of a hot source gives:
3.
Which one forms a continuous spectrum?
4.
The threshold frequency depends on:
5.
Emission spectrum appears due to:
6.
Which is true for absorption spectrum?
7.
Dark lines in absorption spectrum occur because:
8.
Line spectra are observed in which state?
9.
A hydrogen discharge tube produces:
10.
Spectroscope is used to:
11.
Emission spectrum shows:
12.
A cool gas in front of a hot source produces dark lines because:
13.
Spectrum is defined as:
14.
Which type of spectrum is produced by sunlight passing through the Earth’s atmosphere?
15.
Which radiation produces the largest number of spectral lines?
16.
Continuous spectrum from the sun is due to:
17.
A hot glowing gas produces what type of spectrum?
18.
Dark lines in the solar spectrum are called:
19.
The photoelectric effect fails when:
20.
If the threshold wavelength is 500 nm, what happens when light of 600 nm falls on the metal?
21.
Absorption spectrum is produced when light passes through:
22.
Absorption spectrum contains:
23.
A spectrograph containing prism splits light due to:
24.
Which region of EM spectrum shows maximum absorption lines in molecules?
25.
Continuous spectrum is obtained when:
26.
Which colour has maximum wavelength in visible spectrum?
27.
Which property distinguishes absorption and emission spectral lines?
28.
Which radiation is not seen in visible spectrum?
29.
The spectrum produced by a glowing tungsten filament is:
30.
Emission spectrum is produced when atoms:
31.
Which spectrum is unique for each element?
32.
Continuous spectrum of VIBGYOR is produced when:
33.
Continuous spectrum merges because:
34.
The slope of KE vs frequency graph in photoelectric effect gives:
35.
In photoelectric effect, the graph of KE vs intensity is:
36.
Which instrument disperses light into its component wavelengths?
37.
What happens to the number of photoelectrons when intensity is doubled at same frequency?
38.
An absorption spectrum is the inverse of:
39.
The graph of KE vs frequency in photoelectric effect is a straight line because:
40.
Band spectrum is usually produced by:
41.
Continuous spectrum lacks:
42.
Emission spectrum lines originate due to:
44.
Line spectra are due to:
45.
Emission spectrum occurs when electrons:
