1.
If the threshold wavelength is 500 nm, what happens when light of 600 nm falls on the metal?
2.
What happens to the number of photoelectrons when intensity is doubled at same frequency?
3.
Which spectrum is unique for each element?
4.
A spectrograph containing prism splits light due to:
5.
Spectrum is defined as:
6.
Emission spectrum lines originate due to:
7.
Which radiation is not seen in visible spectrum?
9.
Emission spectrum occurs when electrons:
10.
The slope of KE vs frequency graph in photoelectric effect gives:
11.
Band spectrum is usually produced by:
12.
Absorption spectrum contains:
13.
A hot glowing gas produces what type of spectrum?
14.
Spectroscope is used to:
15.
Continuous spectrum from the sun is due to:
16.
In photoelectric effect, the graph of KE vs intensity is:
17.
The threshold frequency depends on:
18.
Continuous spectrum of VIBGYOR is produced when:
19.
Emission spectrum appears due to:
20.
The photoelectric effect fails when:
21.
Absorption spectrum is produced when light passes through:
22.
The graph of KE vs frequency in photoelectric effect is a straight line because:
23.
A cool gas in front of a hot source produces dark lines because:
24.
Which colour has maximum wavelength in visible spectrum?
25.
Which radiation produces the largest number of spectral lines?
26.
Continuous spectrum merges because:
27.
Line spectra are due to:
28.
Line spectra are observed in which state?
29.
A cool gas in front of a hot source gives:
30.
Which property distinguishes absorption and emission spectral lines?
31.
Continuous spectrum is obtained when:
32.
Emission spectrum is produced when atoms:
33.
Dark lines in the solar spectrum are called:
34.
Which type of spectrum is produced by sunlight passing through the Earth’s atmosphere?
35.
Which is true for absorption spectrum?
36.
Which of the following produces absorption spectrum?
37.
Which one forms a continuous spectrum?
38.
An absorption spectrum is the inverse of:
39.
Dark lines in absorption spectrum occur because:
40.
Which region of EM spectrum shows maximum absorption lines in molecules?
41.
Emission spectrum shows:
42.
Continuous spectrum lacks:
43.
The spectrum produced by a glowing tungsten filament is:
44.
A hydrogen discharge tube produces:
45.
Which instrument disperses light into its component wavelengths?
