1.
Emission spectrum lines originate due to:
2.
Which colour has maximum wavelength in visible spectrum?
3.
A cool gas in front of a hot source gives:
4.
The spectrum produced by a glowing tungsten filament is:
5.
Which of the following produces absorption spectrum?
6.
Emission spectrum appears due to:
7.
Emission spectrum shows:
8.
The photoelectric effect fails when:
9.
Line spectra are due to:
10.
A hot glowing gas produces what type of spectrum?
12.
Which radiation is not seen in visible spectrum?
13.
Which is true for absorption spectrum?
14.
If the threshold wavelength is 500 nm, what happens when light of 600 nm falls on the metal?
15.
Band spectrum is usually produced by:
16.
Emission spectrum occurs when electrons:
17.
Continuous spectrum is obtained when:
18.
Continuous spectrum from the sun is due to:
19.
Continuous spectrum lacks:
20.
A hydrogen discharge tube produces:
21.
Which property distinguishes absorption and emission spectral lines?
22.
The slope of KE vs frequency graph in photoelectric effect gives:
23.
Which spectrum is unique for each element?
24.
Which region of EM spectrum shows maximum absorption lines in molecules?
25.
Continuous spectrum of VIBGYOR is produced when:
26.
Line spectra are observed in which state?
27.
The graph of KE vs frequency in photoelectric effect is a straight line because:
28.
Dark lines in the solar spectrum are called:
29.
Absorption spectrum is produced when light passes through:
30.
In photoelectric effect, the graph of KE vs intensity is:
31.
The threshold frequency depends on:
32.
Continuous spectrum merges because:
33.
Which instrument disperses light into its component wavelengths?
34.
Absorption spectrum contains:
35.
A spectrograph containing prism splits light due to:
36.
Spectroscope is used to:
37.
Which type of spectrum is produced by sunlight passing through the Earth’s atmosphere?
38.
Dark lines in absorption spectrum occur because:
39.
A cool gas in front of a hot source produces dark lines because:
40.
Which one forms a continuous spectrum?
41.
What happens to the number of photoelectrons when intensity is doubled at same frequency?
42.
Emission spectrum is produced when atoms:
43.
An absorption spectrum is the inverse of:
44.
Spectrum is defined as:
45.
Which radiation produces the largest number of spectral lines?
