1.
Emission spectrum appears due to:
2.
An absorption spectrum is the inverse of:
3.
Spectrum is defined as:
4.
A hot glowing gas produces what type of spectrum?
5.
The slope of KE vs frequency graph in photoelectric effect gives:
7.
Dark lines in absorption spectrum occur because:
8.
Absorption spectrum is produced when light passes through:
9.
Which one forms a continuous spectrum?
10.
What happens to the number of photoelectrons when intensity is doubled at same frequency?
11.
Continuous spectrum from the sun is due to:
12.
Continuous spectrum merges because:
13.
Continuous spectrum is obtained when:
14.
Which radiation is not seen in visible spectrum?
15.
If the threshold wavelength is 500 nm, what happens when light of 600 nm falls on the metal?
16.
Emission spectrum shows:
17.
Which of the following produces absorption spectrum?
18.
A hydrogen discharge tube produces:
19.
The spectrum produced by a glowing tungsten filament is:
20.
Continuous spectrum lacks:
21.
In photoelectric effect, the graph of KE vs intensity is:
22.
The threshold frequency depends on:
23.
Which is true for absorption spectrum?
24.
Dark lines in the solar spectrum are called:
25.
The graph of KE vs frequency in photoelectric effect is a straight line because:
26.
Continuous spectrum of VIBGYOR is produced when:
27.
Emission spectrum is produced when atoms:
28.
Line spectra are observed in which state?
29.
Which instrument disperses light into its component wavelengths?
30.
Which radiation produces the largest number of spectral lines?
31.
Which colour has maximum wavelength in visible spectrum?
32.
Which property distinguishes absorption and emission spectral lines?
33.
The photoelectric effect fails when:
34.
Which spectrum is unique for each element?
35.
Line spectra are due to:
36.
Emission spectrum occurs when electrons:
37.
Band spectrum is usually produced by:
38.
Spectroscope is used to:
39.
A cool gas in front of a hot source produces dark lines because:
40.
Which region of EM spectrum shows maximum absorption lines in molecules?
41.
A spectrograph containing prism splits light due to:
42.
A cool gas in front of a hot source gives:
43.
Absorption spectrum contains:
44.
Emission spectrum lines originate due to:
45.
Which type of spectrum is produced by sunlight passing through the Earth’s atmosphere?
